Ar`gu*men*ta"tion (&?;), n. [L. argumentatio, from argumentari: cf. F. argumentation.] 1. The act of forming reasons, making inductions, drawing conclusions, and applying them to the case in discussion; the operation of inferring propositions, not known or admitted as true, from facts or principles known, admitted, or proved to be true.

Which manner of argumentation, how false and naught it is, . . . every man that hath with perceiveth.
Tyndale.

2. Debate; discussion.

Syn. -- Reasoning; discussion; controversy. See Reasoning.