1. (n.) A breaking or infraction of a law, or of any obligation; violation; non-fulfillment; as, a breach of contract; a breach of promise\.
2. (n.) The act of breaking, in a figurative sense.
3. (n.) A gap or opening made by breaking or battering, as in a wall or fortification; the space between the parts of a solid body rent by violence; a break; a rupture.
4. (n.) A breaking of waters, as over a vessel; the waters themselves; surge; surf.
5. (n.) A breaking up of amicable relations; rupture.
6. (n.) A bruise; a wound.
7. (n.) A hernia; a rupture.
8. (n.) A breaking out upon; an assault.
9. (v. t.) To make a breach or opening in; as, to breach the walls of a city.
10. (v. i.) To break the water, as by leaping out; -- said of a whale.