a failure to perform some promised act or obligation

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

a personal or social separation (as between opposing factions)

act in disregard of laws, rules, contracts, or promises

make an opening or gap in

a breach of a legal duty; failure to do something that is required in a contract

a breach of due care

failure to keep a promise (of marriage)

a failure of the seller's guarantee of good title

any act of molesting, interrupting, hindering, agitating, or arousing from a state of repose or otherwise depriving inhabitants of the peace and quiet to which they are entitled

violation (either through fraud or negligence) by a trustee of a duty that equity requires of him

larceny after trust rather than after unlawful taking

a breach that occurs when an item is deficient according to the terms of a warranty