An extra job or activity done alongside your main work; the line marking the edge of a sports field; a position of not being involved; to prevent someone from playing or participating; to push someone into a less important role.
Tom loved his office job, but on weekends he repaired old furniture as a sideline. It started as a hobby, but word spread quickly. Now he earns almost as much from it as his regular salary.
This meaning is about something you do in addition to your main job to earn extra money. Imagine a teacher who bakes custom cakes every weekend and sells them online — that’s her sideline. This is a secondary activity that brings in extra income. You might hear “she runs a small catering business as a sideline” or someone could say “what started as a sideline eventually became my full-time job.” Or picture an accountant who does freelance photography on the side — it’s a nice little sideline that keeps things interesting. The word suggests something extra, not your main focus. ✏️ “As a sideline” is the most natural way to use this — it tells people the activity is secondary, not the main thing you do.
Vivid example: Maria worked as a nurse during the week. But she had a profitable sideline making handmade jewellery that she sold at local markets. Some months, her weekend earnings almost matched her hospital pay.
This meaning is about the physical boundary line that runs along the long sides of a sports field or court. Imagine watching a football match and the ball flies past the sideline — the referee blows the whistle because it’s gone out of play. This is the sideline — the line that marks the edge of the playing area. You might hear “the ball landed just inside the sideline” or a commentator could say “the coach is pacing up and down the sideline.” Or picture a basketball game where a player saves the ball just before it crosses the sideline. The word refers to a specific physical boundary in sport. ✏️ Coaches, substitutes, and staff usually stand along the sideline during matches — that’s their designated area.
Vivid example: The winger sprinted down the pitch at full speed. He managed to keep the ball just inside the sideline before delivering a perfect cross. The crowd erupted as the striker headed it straight into the net.
This meaning is about being in a position where you watch something happen without being part of it. Imagine a big project at work where all the major decisions are being made by others, and you’re just sitting on the sidelines with no say. This is being on the sidelines — left out, watching from the edge. You might hear “I’ve been on the sidelines for too long — I want to get involved” or someone could say “he watched from the sidelines while the others made all the decisions.” Or think about a country that stays on the sidelines during an international crisis, choosing not to act. The phrase carries a feeling of being excluded or choosing not to participate. ✏️ “On the sidelines” and “from the sidelines” are the most common forms — both suggest you’re outside the action looking in.
Vivid example: The new employee watched the heated meeting from the sidelines without saying a word. She wanted to speak up but didn’t feel confident enough yet. After a few weeks, she finally found her voice and joined the discussion.
This meaning is about a sports player being forced to stop playing, usually because of an injury. Imagine a star striker who tears a muscle during training and is sidelined for the rest of the season — he can’t play, he can only watch. This is being sidelined — taken out of action by something physical. You might hear “the defender has been sidelined with a knee injury” or a report could say “she was sidelined for six weeks after surgery.” Or picture a tennis player who pushes too hard and gets sidelined by a back problem right before a major tournament. The word suggests being forced to stop against your will. ✏️ This is almost always used in the passive — “be sidelined” or “get sidelined” — because the player doesn’t choose it; injury forces them out.
Vivid example: The team’s best goalkeeper twisted his ankle during warm-up. He was sidelined for the entire tournament and had to watch every match from the bench. It was the most frustrating experience of his career.
This meaning is about removing someone from a position of influence or making them feel less important. Imagine a manager who starts getting excluded from key meetings after disagreeing with the boss — she’s being sidelined, pushed to the edge where she has no real power. This is sidelining — making someone less relevant on purpose. You might hear “after the restructure, several experienced staff were sidelined” or someone could say “I feel like I’m being sidelined since the new director arrived.” Or think about a politician who criticises their own party and suddenly finds themselves sidelined from important committees. The word carries a strong sense of being deliberately pushed aside. ✏️ Unlike meaning 4, this isn’t about injury — it’s about power. Someone with authority decides you’re no longer important enough to be involved.
Vivid example: After she raised concerns about the company’s spending, her manager quietly sidelined her from all major projects. She was given routine tasks that didn’t matter. It was clear they wanted her out of the picture.
Examples from the street:
“He was sidelined at work after disagreeing with the boss publicly.” → He was pushed out of important decisions and ignored at his job after openly challenging his manager
“I’m tired of sitting on the sidelines — I want to get involved.” → I’m fed up with watching from the outside without contributing — I want to take part
“A knee injury sidelined her for the entire season.” → A problem with her knee forced her out of action and she missed every match of the whole season
Sideline as excluding or pushing someone out of activity (verb) — VERY COMMON:
– be sidelined → be pushed aside, excluded from decisions or important activity
– be/get sidelined by something → be forced out of action because of something (injury, politics, circumstances)
– sidelined at work → excluded from meaningful tasks, decisions, or opportunities in the workplace
– sideline someone → deliberately exclude or marginalise a person
– sidelined for weeks/months → kept out of action for a period of time (especially sport)
– feel sidelined → feel ignored, excluded, or pushed to the margins
Sideline(s) as the edge or margin of activity (noun) — VERY COMMON:
– on the sidelines → watching from the edge without being involved or participating
– sit/stand/stay on the sidelines → choose or be forced to watch without getting involved
– from the sidelines → observing or commenting from outside rather than participating directly
– watch from the sidelines → observe without being involved or having influence
– on the sidelines of (an event/conference) → in the margins of a larger event, often where informal discussions happen
Sideline as a secondary activity (noun):
– a sideline → a secondary job, business, or activity alongside your main one
– as a sideline → done in addition to your primary work
– a profitable/nice little sideline → a secondary activity that earns good money
Example Sentences
1. She was sidelined at work after raising concerns about management — suddenly she was excluded from every important meeting
→ She was pushed out of all meaningful activity at her job after voicing worries about the leadership — from that point on she was cut out of every significant discussion.
2. A hamstring injury sidelined the striker for six weeks at the worst possible time
→ A muscle tear in the back of his leg forced the forward out of action for a month and a half exactly when the team needed him most.
3. I’m tired of sitting on the sidelines while everyone else makes the decisions
→ I’m fed up with watching passively while other people make all the choices that affect me.
4. He runs a small catering business as a sideline alongside his full-time teaching job
→ He operates a small food service company as a secondary income source in addition to his main career as a teacher.
5. The government has been accused of sidelining expert advice in favour of political convenience
→ The authorities have been criticised for ignoring and pushing aside professional guidance in order to do what is politically easier.
6. She watched from the sidelines as her colleagues were promoted one by one
→ She observed passively from the outside as her workmates were given higher positions one after another.
7. After the restructuring, several experienced managers felt sidelined and eventually left the company
→ Following the organisational changes, a number of senior leaders felt pushed aside and marginalised, and they ultimately decided to resign.
8. The two presidents held an informal meeting on the sidelines of the G20 summit
→ The two heads of state had a casual private discussion in the margins of the major international gathering.
9. He’s had a profitable little sideline selling vintage watches online for years
→ He’s been running a nicely profitable secondary business trading classic timepieces on the internet for a long time.
10. You can’t complain about the outcome if you chose to stay on the sidelines and not get involved
→ You have no right to criticise the result if you deliberately chose to remain uninvolved and watch from the outside instead of participating.
Learner Examples
1. Quieter students often get sidelined in group activities — a good teacher makes sure every voice is heard
→ Less outspoken pupils are frequently pushed aside and excluded during team tasks — an effective educator ensures that every single person gets the chance to contribute.
2. Teachers shouldn’t sit on the sidelines during speaking practice — joining in and modelling natural conversation makes a real difference
→ Educators shouldn’t remain passive observers during oral exercises — getting involved and demonstrating authentic dialogue has a genuinely positive impact on learning.
✔ Native usage tips
– The word comes from sport — the “sideline” is literally the line at the edge of a football pitch, basketball court, or similar field. Players who aren’t playing sit “on the sidelines.” The figurative meanings all extend from this image of being on the edge, watching but not participating
– “Sidelined” in sport and “sidelined” in life work identically — a footballer sidelined by injury and an employee sidelined by office politics share the same experience: being forced out of the action against their will. Native speakers move between the sporting and figurative meanings seamlessly
– “On the sidelines of” is diplomatic and political language — you’ll constantly hear “on the sidelines of the conference/summit/meeting” in news reports. It describes informal conversations that happen alongside a formal event. “The trade deal was agreed on the sidelines of the UN summit” is standard journalistic phrasing
– “Sit on the sidelines” implies a choice; “be sidelined” implies being forced — this is an important distinction. “He sat on the sidelines” suggests he chose not to get involved. “He was sidelined” suggests someone else excluded him. The active form implies passivity by choice; the passive form implies being marginalised by others
– “A sideline” as a secondary business is always positive or neutral — “she runs a bakery as a sideline” simply means it’s her secondary income source. There’s no negative judgment — it often implies entrepreneurial spirit. “A nice little sideline” is a common, slightly admiring way to describe a profitable secondary activity
– “Feel sidelined” is powerful workplace vocabulary — this phrase appears constantly in discussions about office dynamics, workplace fairness, and employee dissatisfaction. “I feel sidelined” is a clear, non-confrontational way to express that you feel excluded or undervalued at work
– “Sideline” vs “side hustle” — a “sideline” is any secondary activity or business, often established and ongoing. A “side hustle” is more modern, informal slang for a secondary income source, often with an entrepreneurial, self-made feel. Young people tend to say “side hustle”; older or more formal speakers say “sideline”
✔ Similar expressions / words
– Marginalise → more formal and academic; implies pushing someone to the edges of a group or society over time; “marginalised communities” describes entire groups excluded from power and opportunity; “sidelined” is more immediate and personal — it’s what happens to an individual in a specific situation
– Bench (verb) → informal and directly from sport; “the coach benched him” means he was dropped from the starting team; it’s more casual and specific than “sidelined,” which works in any context; “benched” stays close to its sporting roots even when used figuratively
– Exclude → the plain, direct equivalent; “she was excluded from the meeting” is neutral and factual, while “she was sidelined” carries more emotional weight and implies unfairness; “exclude” describes what happened, “sideline” suggests how it felt