Englishfor English speakers
interval
Noun
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A distance in space or in time.
There is a ten-minute interval between classes.
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In music, an interval is the difference in pitch between two notes.
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In mathematics, an interval is a connected section of the real line.
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(mostly British) An intermission.
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In the game of cricket, either of the two breaks, at lunch and tea, between the three sessions of a day's play.
timer
Noun
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A timer is a device that times something.
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#A timer tells you when a certain amount of time is over. You set the timer for a the amount of time you want; after that amount of time it will let know in some way (often a bell will ring).
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#A timer tells how much time has passed since it was started.