n. The character of being formal; strict adherence to or observance of prescribed or recognized form, rule, style, etiquette, or the like; excessive attachment to conventional usage, or (especially in religion) to external forms and observances; hence, artificiality or cold stiffness of manner or behavior: as, judicial formalism; formalism in art; the formalism of pedantry or of court life; cold formalism in public worship.n. In philos.: The system which denies the existence of matter and recognizes form only; phenomenal idealism.n. A belief in the sufficiency of formal logic, especially of the traditional syllogistic, for the purposes of human thought.