Origin: 1535–45 for adj. use

Related forms: staidly, adverb
staidness, noun
Synonyms:
1. proper, serious, decorous, solemn. Staid, sedate, settled indicate a sober and composed type of conduct. Staid indicates an ingrained seriousness and propriety that shows itself in complete decorum; a colorless kind of correctness is indicated: a staid and uninteresting family. Sedate applies to one who is noticeably quiet, composed, and sober in conduct: a sedate and dignified young man. One who is settled has become fixed, esp. in a sober or determined way, in manner, judgments, or mode of life: He is young to be so settled in his ways.
Antonyms:
1. wild, frivolous.