a. 正式的, 形式的, 礼仪的, 拘于礼节的, 拘谨的

n. 正式的社交活动

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

s. characteristic of or befitting a person in authority

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

s. logically deductive