n. A wicked, foul, or treacherous act; wickedness.n. Specificallyn. In law:n. At common law, a crime which occasions the forfeiture of land or goods, or both, and for which other punishment may be added according to the degree of guilt. It thus strictly includes treason, although the words are often used as opposed to each other.n. A high crime; the highest of the principal classes into which crimes are divided by statute; a grave crime exceeding the grade of misdemeanor.n. A body of felons.