Proposition  —n. 1 statement, assertion. 2 scheme proposed, proposal. 3 logic statement subject to proof or disproof. 4 colloq. Problem, opponent, prospect, etc. For consideration (difficult proposition). 5 math. Formal statement of a theorem or problem, often including the demonstration. 6 a likely commercial etc. Enterprise etc. B person regarded similarly. 7 colloq. Sexual proposal. —v. Colloq. Make a (esp