Definition: An evening gown.
Definition: being in accord with established forms and conventions and requirements (as e.g. of formal dress); "pay one's formal respects"; "formal dress"; "a formal ball"; "the requirement was only formal and often ignored"; "a formal education"
Definition: characteristic of or befitting a person in authority; "formal duties"; "an official banquet"
Definition: (of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms; "the paper was written in formal English"
Definition: logically deductive; "formal proof"
Definition: refined or imposing in manner or appearance; befitting a royal court; "a courtly gentleman"
Definition: Being in accord with established forms.