non·con·for·mi·ty /ˌnän-kən-'fȯr-mə-tē/ n pl -ties
1: failure to conform to or comply with something (as contract requirements)
acceptance of goods occurs when the buyer...will take or retain them in spite of their nonconformity — Uniform Commercial Code
2: a particular aspect in which something is nonconforming
cannot revoke an acceptance he made with knowledge of a nonconformity — J. J. White and R. S. Summers
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.