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being in accordance with the usual requirements, customs, etc.; conventional.

marked by form or ceremony.

designed for wear or use at occasions or events marked by elaborate ceremony or prescribed social observance.

requiring a type of dress suitable for such occasions.

observant of conventional requirements of behavior, procedure, etc., as persons; ceremonious.

excessively ceremonious.

being a matter of form only; perfunctory.

made or done in accordance with procedures that ensure validity.

of, relating to, or emphasizing the organization or composition of the constituent elements in a work of art perceived separately from its subject matter.

being in accordance with prescribed or customary forms.

Theater.��(of a stage setting) generalized and simplified in design, especially of architectural elements, and serving as a permanent set for a play irrespective of changes in location.

acquired in school; academic.

symmetrical or highly organized.

of, reflecting, or noting a usage of language in which syntax, pronunciation, etc., adhere to traditional standards of correctness and usage is characterized by the absence of casual, contracted, and colloquial forms.

Philosophy.��

1. pertaining to form.

2. Aristotelianism.��not material; essential.

Logic.��formal logic.

pertaining to the form, shape, or mode of a thing, especially as distinguished from the substance.

being such merely in appearance or name; nominal.

Mathematics.��

1. (of a proof ) in strict logical form with a justification for every step.

2. (of a calculation) correct in form; made with strict justification for every step.

3. (of a calculation, derivation, representation, or the like) of or relating to manipulation of symbols without regard to their meaning.

a dance, ball, or other social occasion that requires formalwear.

an evening gown.