The Collaborative International Dictionary of English v.0.48:
Lawsuit \Law"suit`\, n. An action at law; a suit in equity or admiralty; any legal proceeding before a court for the enforcement of a claim. [1913 Webster]WordNet (r) 3.0 (2006):
lawsuit n 1: a comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy; "the family brought suit against the landlord" [syn: lawsuit, suit, case, cause, causa]