say it: uhn-BUHT-uhnd
unbuttoned is an adjective meaning "not buttoned". It carries 2 recorded senses.
not buttoned
“the wind picked up the hem of her unbuttoned coat”
not under constraint in action or expression
“this unbuttoned and disrespectful age”
“unlaced behavior in the neighborhood pub”
Definitions, synonyms and semantic relations for unbuttoned come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.