Definition of interval
1a : a space of time between events or states a two-month interval between medical treatments There were long intervals during the game in which nothing exciting happened.
b British : intermission There was a twenty minute interval between acts two and three.
2 : the difference in pitch between two tones
3 : a space between objects, units, points, or states The posts were set up at regular intervals along the road.
4 : one of a series of fast-paced or intense physical exercises alternated with slower or less intense ones or brief rests for training (as of an athlete) — see also interval training
5 : a set of real numbers between two numbers either including or excluding one or both of them
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
Ask the Editors