being in accord with established forms and conventions and requirements (as e.g. of formal dress)
- "a formal education"
- "the requirement was only formal and often ignored"
- "a formal ball"
- "formal dress"
- "pay one's formal respects"
characteristic of or befitting a person in authority
- "an official banquet"
- "formal duties"
(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"
- "formal proof"