INTERVAL

noun see: wall Date: 14th century 1. a space of time between events or states, intermission , 2. a space between objects, units, points, or states, difference in pitch between tones, a set of real numbers between two numbers either including or excluding one or both of them, one of a series of fast-paced exercises interspersed with slower ones or brief rests for training (as of an athlete), ~lic adjective