Wiktionary
n. (context legal English) An unjustifiable failure to perform under the terms of a contract when performance is due.
WordNet
n. a breach of a legal duty; failure to do something that is required in a contract
Wikipedia
Breach of contract is a legal cause of action in which a binding agreement or bargained-for exchange is not honored by one or more of the parties to the contract by non-performance or interference with the other party's performance. If the party does not fulfill his contractual promise, or has given information to the other party that he will not perform his duty as mentioned in the contract or if by his action and conduct he seems to be unable to perform the contract, he is said to breach the contract.
Breach of contract is a type of civil wrong.
Usage examples of "breach of contract".
With Munk and Tunk in custody, the only potential catastrophe for the errant cadet would be if the Grand Nagus filed an action for the breach of contract.
Actions for breach of contract were threatened in all the courts of the country.
And since we had a standard monogamous contract, your affair with my ex-employee Vicky constitutes a major breach of contract and therefor you forfeit everything.
It would be open war when they discovered that, and breach of contract, too.
The same labourer is punished for breach of contract if he remains away from his metal, paper or glass works on the Sunday, even if it be from a religious whim.
If you speak to a lawyer, and he deems it proper for you to bring suit against your husband for breach of contract, wins the case for you and has your husband ordered to pay you a specified sum, and if your husband then refuses to pay that sum, Mylander and Zanthal will be happy to assist you.
They're threatening to go to court over involuntary breach of contract.
And the only person more undesirable than a gay news anchor is a gay news anchor in the middle of a breach of contract lawsuit.
Secondly, I just heard from Avi, on the plane, that Andrew Loeb is filing a second suit, for breach of contract.