WordNet (r) 3.0 (2006):
unbuttoned adj 1: not buttoned; "the wind picked up the hem of her unbuttoned coat" [syn: unbuttoned, unfastened] [ant: buttoned, fastened] 2: not under constraint in action or expression; "this unbuttoned and disrespectful age"- Curtis Bok; "unlaced behavior in the neighborhood pub" [syn: unbuttoned, unlaced]