Meaning

noun a failure to perform some promised act or obligation

noun an opening (especially a gap in a dike or fortification)

noun a personal or social separation (as between opposing factions)

originFrom Middle English breche, from Old English bryċe (“fracture, breach”) and brǣċ (“breach, breaking, destruction”), from Proto-West Germanic *bruki, from Proto-Germanic *brukiz (“breach, fissure”) and *brēkō (“breaking”).

Etymology from Wiktionary, CC BY-SA 3.0