Definition of interval
1a
: a space of time between events or states
2a
: the difference in pitch between two tones
b
: a space between objects, units, points, or states
3
: one of a series of fast-paced exercises interspersed with slower ones or brief rests for training (as of an athlete)
4
: a set of real numbers between two numbers either including or excluding one or both of them
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Merriam-Webster unabridged
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Time Traveler for interval
The first known use of interval was in the 14th century
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