button down
[adjective]
Synonyms: conventional, orthodox, square, straight

[TahlilGaran] English Synonym Dictionary ▲

ˈbutton-down adjective [only before noun]

1. a button-down shirt or collar has the ends of the collar fastened to the shirt with buttons

2. a button-down company or style is formal and traditional:
He didn’t fit in with the button-down culture of his new boss.

[TahlilGaran] Dictionary of Contemporary English ▲

button down
v., slang (stress on "down") To state precisely, to ascertain, to pin down, to peg down.
First let's get the facts buttoned down, then we can plan ahead.

[TahlilGaran] English Idioms Dictionary ▲

button down
attrib. adj., slang (stress on "button") Well-groomed, conservatively dressed.
Joe is a regular button-down type.

[TahlilGaran] English Idioms Dictionary ▲