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