SynonymDefinitionAntonym.com - English Synonym Dictionary

A gown for evening wear

A lavish dance requiring formal attire

Being in accord with established forms and conventions and requirements (as e.g. of formal dress)

(of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms

Refined or imposing in manner or appearance; befitting a royal court

Logically deductive

Represented in simplified or symbolic form

Characteristic of or befitting a person in authority