Adjective: button-down bú-t(u)n dawn
- Of a shirt; having the ends of the collar fastened down by buttons
"Brooks Brothers button-down shirts"
- Unimaginatively conventional
"He maintained a button-down approach to business";
- buttoned-down [US, informal], conservative
See also: buttoned, conventional, fastened, mainstream, staid, stodgy, stuffy
Encyclopedia: Button-down