bou ‧ ton ‧ ni ‧ ere /buːˌtɒniˈeə $ ˌbuːtnˈɪr/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: French ; Origin: boutonnière , from bouton 'button' ]
American English a flower that a man wears fastened to his jacket at a wedding SYN buttonhole British English