ETYM Old Eng. breke, breche, AS. brice, gebrice, gebrece (in comp.), from brecan to break; akin to Dan. braek, Mid. High Germ. breche, gap, breach. Related to Break, Brake (the instrument), Brack a break.
(Irregular plural: breaches).
1. A failure to perform some promised act or obligation.
2. An opening (especially a gap in a dike or fortification).
1. A set containing all points (or all real numbers) between two given endpoints.
2. The difference in pitch between two notes; SYN. musical interval.
3. The distance between things; SYN. separation.
In music, the pitch difference between two notes, expressed in terms of the diatonic scale, for example a fifth, or as a harmonic ratio, 3:2.