Bound

adjective / verb / noun
bounds (3rd person singular), bounded (past simple/past participle), bounding (present participle)
Frequency
High
CEFR Level
B1
Register
Neutral
Domain
Everyday
📄

Definition

1. To jump or leap with energy.
2. To form the boundary of something.
3. (adjective): tied or fastened.
4. Certain or destined to happen.
5. Heading toward a destination.
6. Obligated or restricted by rules.
7. (noun): a leap or jump.
8. Limits or boundaries.
✨

Context Alive

With her talent, work ethic, and the connections she had been building for years, she was bound to succeed in the competitive world of fashion design—it wasn’t a question of if but when her name would become recognized across the industry.
📖

Meanings

12 meanings
1 Certain or Destined to Happen — 'Bound To' (Adjective) — VERY COMMON Common ▼
This is one of the most frequent uses in everyday conversation. When something is “bound to” happen, it’s almost certain—you’re confident it will occur. Mistakes are bound to happen when you’re learning. Problems are bound to arise. If you don’t sleep, you’re bound to be exhausted. It expresses strong expectation, almost inevitability.
💎 Vivid Example
With three teenagers living under the same roof, arguments were bound to happen eventually, and when they did, the parents had learned to let the siblings work things out rather than constantly intervening.
2 Heading Toward a Destination — 'Bound For' (Adjective) — VERY COMMON Common ▼
When you’re “bound for” somewhere, you’re traveling toward that destination. A train bound for Paris. A ship bound for America. A student bound for college. It can also be figurative—someone bound for greatness is heading toward success in life, not just traveling somewhere physically.
💎 Vivid Example
She stood on the platform watching the train bound for London pull away, wondering if she should have been braver and actually gotten on it instead of staying in the small town where nothing ever seemed to change.
3 Tied or Fastened Tightly (Adjective) — COMMON Common ▼
This comes from “bind”—when something is bound, it’s been tied up, secured, or fastened. Hands bound with rope. A bound prisoner. Pages bound into a book. It’s about being physically restricted or held together by something wrapped around or through.
💎 Vivid Example
The old letters were bound together with a faded red ribbon, tied carefully by her grandmother decades ago and never opened since, holding secrets from a time before anyone still living could remember.
4 Obligated or Required by Duty or Agreement — 'Bound By' (Adjective) — VERY COMMON Common ▼
When you’re “bound by” something, you’re obligated to follow it—a contract, a promise, a law, or a moral code. Doctors are bound by medical ethics. Lawyers are bound by confidentiality. You might feel bound by family duty or bound by your word. It’s restriction through obligation rather than physical ties.
💎 Vivid Example
The journalist was bound by her promise to protect her source’s identity, refusing to reveal the whistleblower’s name even when threatened with jail time for contempt of court.
5 To Jump or Leap Energetically (Verb) — COMMON Common ▼
When you bound, you jump or leap with enthusiasm and energy—usually in a happy, carefree way. Dogs bound across fields. Children bound down stairs. Deer bound through forests. It suggests joyful, energetic movement, not just ordinary jumping. There’s lightness and excitement in bounding.
💎 Vivid Example
The golden retriever bounded across the beach toward its owner, ears flapping and tongue hanging out, so overjoyed at the sight of the tennis ball that it nearly knocked over two sunbathers in its excitement.
6 A Leap or Jump (Noun) — COMMON Common ▼
As a noun, a bound is the jump itself—a single energetic leap. “In one bound” means with a single jump. The word suggests power and grace combined, movement that covers distance impressively. Athletes, animals, and adventurers all make bounds.
💎 Vivid Example
With a single powerful bound, the cat leaped from the floor to the top of the refrigerator, settling there to watch the household below like a furry king surveying his kingdom from a throne.
7 Limits or Boundaries — 'Bounds' (Noun) — COMMON Common ▼
The bounds of something are its limits—the edges beyond which you shouldn’t go. Staying within bounds. Going beyond the bounds of decency. The bounds of possibility. It’s usually plural and often appears in expressions about limits, restrictions, or acceptable ranges.
💎 Vivid Example
His curiosity knew no bounds, leading him to ask questions that others considered too personal, too strange, or too uncomfortable—but which often uncovered fascinating truths nobody else had thought to explore.
8 Restricted or Unable to Leave — 'Housebound/Bedbound' (Adjective) — COMMON Common ▼
Combined with other words, bound often means “restricted to” or “unable to leave.” Housebound means unable to leave your house. Bedbound means confined to bed. Wheelchair-bound means using a wheelchair. Snowbound means trapped by snow. It suggests being stuck somewhere, usually unwillingly.
💎 Vivid Example
After breaking her leg, she was housebound for six weeks, watching enviously through the window as her neighbors enjoyed the beautiful spring weather while she sat trapped inside with her cast and her crutches.
9 'Out of Bounds' — Prohibited or Off-Limits (Idiomatic) — VERY COMMON Common ▼
When something is “out of bounds,” you’re not allowed to go there or do it. In sports, the ball goes out of bounds when it leaves the playing area. In life, topics can be out of bounds for discussion. Areas can be out of bounds for visitors. It means “not permitted” or “restricted access.”
💎 Vivid Example
Her father’s home office was strictly out of bounds to the children, a mysterious room filled with important papers and fascinating gadgets that became even more tempting precisely because they were forbidden to enter it.
10 'By Leaps and Bounds' — Very Quickly and Successfully (Idiomatic) — VERY COMMON Common ▼
When something improves or grows “by leaps and bounds,” it’s progressing rapidly and impressively. Her confidence grew by leaps and bounds. The business expanded by leaps and bounds. Technology advances by leaps and bounds. It’s enthusiastic language for dramatic, fast improvement.
💎 Vivid Example
Her Spanish improved by leaps and bounds after she moved to Barcelona, going from barely ordering coffee to having philosophical conversations with locals in just six months of total immersion.
11 'Bound and Determined' — Absolutely Committed (Idiomatic) — COMMON Common ▼
When someone is “bound and determined” to do something, nothing will stop them—they’re completely committed and stubborn about achieving their goal. It suggests fierce willpower and refusal to give up, no matter what obstacles appear.
💎 Vivid Example
She was bound and determined to finish the marathon even after twisting her ankle at mile eighteen, limping across the finish line three hours later while her worried family watched with a mixture of admiration and exasperation.
12 'Know No Bounds' — To Be Unlimited (Idiomatic) — COMMON Common ▼
When something “knows no bounds,” it has no limits—it extends endlessly in all directions. Joy that knows no bounds. Generosity that knows no bounds. Unfortunately, stupidity and cruelty can also know no bounds. It emphasizes the extreme, unlimited nature of whatever’s being described.
💎 Vivid Example
His arrogance knew no bounds, leading him to lecture actual experts in their own fields, correct professors who had studied subjects for decades, and offer unsolicited advice to absolutely everyone he encountered.
💬

Examples from the Street

“It was bound to happen sooner or later.”
It was certain/inevitable that this would occur eventually
“I’m bound by the contract — I can’t leave for another year.”
I’m legally obligated; the agreement restricts me
“Where are you bound for?”
Where are you heading/going?
🧩

Common Patterns

bound to happen → certain to occur; inevitable
bound to + verb → certain to do something
it was bound to end badly → it was inevitable it would fail
you’re bound to make mistakes → you will certainly make errors
bound by contract/law/rules → legally or morally obligated
bound by duty/honour → obligated by moral responsibility
legally/contractually bound → required by law or agreement
duty-bound to + verb → obligated by responsibility to do something
bound for + destination → travelling towards; heading to
London-bound/homeward-bound → heading to London/home
where are you bound (for)? → where are you going?
bound for success/failure → destined for a particular outcome
bound (up) with → closely connected to
bound together → tied or united
bound hand and foot → completely tied up; helpless
bound across/over/into → leap energetically
in one bound → in a single leap
by/in leaps and bounds → very rapidly
🔗

Collocations

5 collocations
bound to happen
certain to occur sooner or later
duty bound
obligated by responsibility or moral duty
bound for
heading towards a destination
bound by law
legally required to do something
know no bounds
have no limits
✍️

Example Sentences

12 examples
1
With that attitude, you’re bound to fail
With that mindset, you will certainly not succeed.
2
It was bound to happen — they never communicated properly
It was inevitable — they never talked to each other effectively.
3
I’m bound by a confidentiality agreement, so I can’t discuss it
I’m restricted by a secrecy contract, so I’m unable to talk about it.
4
As a doctor, she felt duty-bound to help
As a medical professional, she felt morally obligated to assist.
5
The train bound for Edinburgh leaves from platform 4
The service heading to the Scottish capital departs from platform 4.
6
She’s a talented young artist bound for great things
She’s a gifted young creative destined for significant achievements.
7
His identity is closely bound up with his career
His sense of self is deeply connected to his professional life.
8
The prisoners were bound hand and foot
The captives were completely tied up and unable to move.
9
The dog came bounding across the field towards us
The animal came leaping energetically over the grass in our direction.
10
Her confidence has grown by leaps and bounds this year
Her self-assurance has increased very rapidly over the past twelve months.
🎓 Learner Examples
★
If you practise speaking every day, you’re bound to improve — it’s just a matter of time
If you work on conversation daily, you will certainly get better — it’s only a question of when.
★
A student’s progress is often bound up with their confidence — the more they believe in themselves, the faster they learn
A learner’s development is frequently connected to their self-belief — the greater their faith in their abilities, the quicker they acquire skills.
⚡

Phrasal Verbs & Idioms

4 items
🔥 Phrasal Verbs
bound for — heading toward a destination
We hopped on a train bound for the coast early that morning.
💬 Idioms & Expressions
bound and determined — very determined to do something
She was bound and determined to finish the marathon this year.
by leaps and bounds — rapidly and significantly
His English has improved by leaps and bounds since September.
out of bounds — beyond acceptable limits
Personal questions about salary are out of bounds during the interview.
🔄

Synonyms & Antonyms

7 items
✅ Synonyms
destined
certain to happen
heading for
going towards a destination
obliged
required to do something
tied
connected or restricted
❌ Antonyms
free
not restricted
unlikely
probably not going to happen
unbound
not tied down