co·gent (kō'jənt) adj. Appealing to the intellect or powers of reasoning; convincing: a cogent argument. See Synonyms at valid. [Latin cōgēns, cōgent-, present participle of cōgere, to force : co-, co- + agere, to drive; see ag- in Indo-European roots.] co'gen·cy (-jən-sē) n., co'gent·ly adv. |