button-down
1. [ adjective ] unimaginatively conventional
Synonyms: conservative buttoned-down
Examples:

"a colorful character in the buttoned-down, dull-gray world of business"- Newsweek

Related terms: conventional
2. [ adjective ] of a shirt; having the ends of the collar fastened down by buttons
Examples:

"Brooks Brothers button-down shirts"

Related terms: buttoned
Similar spelling:   buttoned-down
  buttoned
  buttonwood
  buttoned-up
  button_tree