n. 1 an intervening time or space. 2 Brit. a pause or break, esp. between the parts of a theatrical or musical performance. 3 the difference in pitch between two sounds. 4 the distance between persons or things in respect of qualities. at intervals here and there; now and then. intervallic adj.
[ ME ult. f. L intervallum space between ramparts, interval (as INTER-, vallum rampart) ]