Main entry: dinner dress, dinner gown, evening gown, formal
Definition: a gown for evening wear
Definition: a lavish dance requiring formal attire
Main entry: courtly, stately, formal
Definition: refined or imposing in manner or appearance; befitting a royal court
Usage: a courtly gentleman
Main entry: formal
Definition: being in accord with established forms and conventions and requirements (as e.g. of formal dress)
Usage: pay one's formal respects; formal dress; a formal ball; the requirement was only formal and often ignored; a formal education
Main entry: formal
Definition: (of spoken and written language) adhering to traditional standards of correctness and without casual, contracted, and colloquial forms
Usage: the paper was written in formal English
Main entry: formal
Definition: logically deductive
Usage: formal proof
Main entry: formal
Definition: characteristic of or befitting a person in authority
Usage: formal duties; an official banquet
Main entry: schematic, formal, conventional
Definition: represented in simplified or symbolic form