button-down

Definitions of button-down
  1. adjective
    of a shirt; having the ends of the collar fastened down by buttons
    “Brooks Brothers button-down shirts”
    Synonyms:
    buttoned, fastened
    furnished or closed with buttons or something buttonlike
  2. adjective
    unimaginatively conventional
    synonyms: buttoned-down, conservative
    conventional
    unimaginative and conformist
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