Synonyms of button down

Adjective

1. button-down, buttoned-down, conservative, conventional (vs. unconventional)

usage: unimaginatively conventional; "a colorful character in the buttoned-down, dull-grey world of business"- Newsweek

2. button-down, buttoned (vs. unbuttoned), fastened

usage: of a shirt; having the ends of the collar fastened down by buttons; "Brooks Brothers button-down shirts"