unbuttoned

Something that's unbuttoned isn't closed or fastened. Your unbuttoned sweater won't keep you very warm on a cold, windy day.

The adjective unbuttoned is what you need when you're talking about a piece of clothing with buttons that aren't fastened, like your unbuttoned wool coat or your unbuttoned, rolled-up shirt sleeves. You can also describe a relaxed or uninhibited person as unbuttoned: "My mom is kind of uptight today, but on the weekends she's way more unbuttoned."

Definitions of unbuttoned

1. adjective

   not buttoned
   “the wind picked up the hem of her unbuttoned coat”

   synonyms: unfastened

   open-collared

   of a shirt; not buttoned at the neck

   antonyms:

   buttoned

   furnished or closed with buttons or something buttonlike

   botonee, botonnee

   (of a heraldic cross) having a cluster of three buttons or knobs at the end of each arm

   button-down

   of a shirt; having the ends of the collar fastened down by buttons
2. adjective

   not under constraint in action or expression
   “"this unbuttoned and disrespectful age"- Curtis Bok”

   synonyms: unlaced

   unrestrained

   not subject to restraint