formal

adjective

1
refined or imposing in manner or appearance; befitting a royal court
a courtly gentleman
2
being in accord with established forms and conventions and requirements (as e.g. of formal dress)
pay one's formal respects
formal dress
3
(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
4
logically deductive
formal proof
5
characteristic of or befitting a person in authority
formal duties
an official banquet
6
represented in simplified or symbolic form

Also useful for “formal”:Unscrambler— Rearrange the letters in “formal”