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1. Definition + Rich Everyday Explanation
Interval (noun) ( in ti vıl ) = a period of time between two events or activities; a break during a performance or event (British English); a gap or space between things; OR the difference in pitch between two musical notes.
This word is fundamentally about gaps — gaps in time, gaps in space, gaps between musical notes, gaps between events. When you understand interval, you can precisely describe the space between things rather than the things themselves. It’s the pause between heartbeats, the break between acts of a play, the distance between fence posts, the silence between words.
MEANING 1: A Period of Time Between Events — VERY COMMON
The most common meaning: the time that passes between two points, events, or activities. “There was a long interval between his first and second novels” means many years passed between them. “The intervals between earthquakes in this region are unpredictable” describes the time gaps between seismic events. “At regular intervals” means with consistent time gaps.
This meaning helps describe patterns, frequency, and gaps in sequences. Buses arrive at ten-minute intervals. Check-ups happen at six-month intervals. The intervals between her visits grew longer. The word emphasises the gap itself rather than the events on either side.
MEANING 2: A Break During a Performance (British English) — VERY COMMON
In British English, the interval is the break in the middle of a theatre performance, concert, or other show — what Americans call “intermission.” “Let’s get a drink during the interval.” “The play has one interval of fifteen minutes.” This is essential vocabulary for anyone attending performances in the UK — signs say “Interval,” programmes list interval timings, and audiences discuss what happens “in the interval.”
MEANING 3: A Gap or Space Between Things — COMMON
Interval can describe physical distance or space between objects. “Plant the trees at three-metre intervals” means with three metres between each. “The fence posts were placed at regular intervals” means evenly spaced. This spatial meaning mirrors the temporal one — both describe the gap between things in a sequence.
MEANING 4: The Difference Between Musical Notes — TECHNICAL
In music theory, an interval is the difference in pitch between two notes. A “perfect fifth” and “major third” are types of intervals. Musicians train their ears to recognise intervals. Composers use intervals to create harmony and melody. While technical, this meaning connects to the core concept — measuring the gap between two points on the musical scale.
MEANING 5: Training Method (Sports/Fitness)
Interval training is an exercise method involving alternating periods of high and low intensity — sprint for thirty seconds, walk for sixty seconds, repeat. The “intervals” are the time blocks of different activity levels. This has become mainstream fitness vocabulary: “I do intervals on the treadmill” or “High-intensity interval training (HIIT) burns more calories.”
INTERVAL vs BREAK vs PAUSE: Subtle Differences
These words overlap but carry different tones. Interval sounds more formal and precise — often implying measured or regular gaps. Break is more casual and everyday — a coffee break, a lunch break. Pause suggests shorter, temporary stopping — a brief hesitation. “At regular intervals” sounds technical; “with regular breaks” sounds casual; “with occasional pauses” sounds momentary.
Examples from the street:
- “There’s a fifteen-minute interval between acts, so we can grab a coffee” → there’s a quarter-hour break in the middle of the performance for refreshments
- “Check your emails at regular intervals throughout the day” → look at your messages with consistent gaps between checks
- “The lampposts are placed at equal intervals along the street” → the lights are positioned with identical spaces between them
2. Most Common Patterns
Interval as time between events — VERY COMMON:
- at regular/irregular intervals → with consistent/inconsistent gaps
- at + time + intervals → with specific gaps (at ten-minute intervals)
- the interval between + A and B → the time gap separating two things
- after an interval of + time → following a gap of specified duration
- at intervals → from time to time; periodically
Interval as theatre break (British):
- the interval → the break during a performance
- during/in the interval → while the break is happening
- a + time + interval → a break of specified length
- interval drinks → refreshments ordered for the break
Interval as space/distance:
- at + distance + intervals → with specific gaps between (at two-metre intervals)
- spaced at regular intervals → positioned with equal gaps
Common expressions:
- interval training → exercise alternating intensity levels
- at periodic intervals → happening regularly but not continuously
- lucid intervals → periods of clarity between confusion (medical/legal)
3. Phrasal Verbs
Note: “Interval” doesn’t form phrasal verbs as a noun — these are related expressions:
- space out → arrange with intervals between; also: become distracted or unfocused
Example: “Space out your revision sessions throughout the week rather than cramming everything into one night.” - spread out → distribute with gaps between; extend over time or space
Example: “The payments are spread out over twelve months, making them more manageable.” - break up → divide into parts with intervals between
Example: “Try to break up long periods of sitting with short walking intervals.”
4. Example Sentences
- The buses run at fifteen-minute intervals during peak hours
→ The coaches operate with quarter-hour gaps between them during busy times. - Would you like to order interval drinks to collect during the break?
→ Do you wish to request refreshments to pick up during the mid-performance pause? - The interval between diagnosis and treatment has decreased significantly in recent years
→ The time gap separating identification and medical care has reduced notably in recent times. - There was a short interval between the two meetings
→ A brief pause separated them. - The alarm sounds at regular intervals
→ It repeats with equal timing. - The play continues after the interval
→ The performance resumes after the break. - She checked her phone at ten-minute intervals
→ She looked repeatedly with time gaps. - Take the tablets at six-hour intervals
→ Space the doses evenly. - Plant the seedlings at thirty-centimetre intervals to give them room to grow
→ Position the young plants with thirty-centimetre gaps between them to allow space for development. - She checked her phone at regular intervals, waiting anxiously for news
→ She looked at her device with consistent gaps between checks, waiting nervously for information. - The opera has two intervals, so it’s quite a long evening
→ The musical drama has two breaks, making it a rather extended night out. - After an interval of ten years, he finally returned to his hometown
→ Following a gap of a decade, he eventually came back to his birthplace. - I’ve started doing interval training — alternating between sprinting and walking
→ I’ve begun practising alternating-intensity exercise — switching between fast running and slow strolling. - Thunder rumbled at intervals throughout the night, keeping everyone awake
→ Storm sounds echoed periodically across the dark hours, preventing anybody from sleeping. - The streetlights were positioned at equal intervals along the entire boulevard
→ The road lamps were placed with identical gaps throughout the whole avenue.
5. Personal Examples
- I recommend students review new vocabulary at regular intervals — once after an hour, again after a day, then after a week — this spaced repetition helps move words from short-term to long-term memory
→ I suggest learners revisit fresh words with consistent gaps — once following sixty minutes, again after twenty-four hours, then following seven days — this distributed practice helps transfer vocabulary from temporary to permanent storage. - Long lessons need short intervals built in — a two-minute movement break every thirty minutes keeps students focused far better than pushing through without stopping
→ Extended classes require brief breaks incorporated — a quick activity pause every half-hour maintains learners’ concentration much more effectively than continuing without rest.
6. Register: Neutral to Slightly Formal
✔ Native usage tips
- British “interval” vs American “intermission”: This is a reliable vocabulary difference between varieties. In UK theatres, you’ll see “Interval” on signs and in programmes; in US theatres, it’s “Intermission.” Both are understood internationally, but using the wrong one marks you as a non-native speaker of that variety
- “At regular intervals” is an extremely common expression in professional and everyday English — it appears in instructions, reports, scientific writing, and casual conversation about anything happening periodically
- “Interval training” / “HIIT” (High-Intensity Interval Training) has become mainstream fitness vocabulary — you’ll hear it constantly in gyms, fitness apps, and health discussions
- “At intervals” alone (without “regular”) means “from time to time” or “periodically” — it suggests recurring but not necessarily predictable occurrences: “Pain returned at intervals throughout the day”
- “Interval drinks” is specific British theatre vocabulary — you can order drinks before the show starts and collect them at the interval bar during the break, avoiding queues
- “Lucid intervals” is a legal and medical term — it describes periods of mental clarity between episodes of confusion or incapacity, relevant in discussions of dementia or mental health
- Mathematical intervals: In maths, an “interval” describes a range of numbers (e.g., “the interval between 0 and 10”). This technical usage appears in statistics, science, and data analysis
✔ Similar expressions / words
- Break → more casual and everyday; interval sounds more formal and measured
- Gap → similar but more general; interval specifically emphasises the space between items in a sequence
- Intermission → American equivalent of interval (theatre break); identical meaning, different variety
