Main entry: open, unfastened
Definition: affording unobstructed entrance and exit; not shut or closed
Usage: an open door; they left the door open
Main entry: untied, unfastened
Definition: not tied
Main entry: unfastened
Definition: not closed or secured
Usage: the car door was unfastened; unfastened seatbelts
Antonyms: fastened
Definition: firmly closed or secured
Main entry: unbuttoned, unfastened
Definition: not buttoned
Usage: the wind picked up the hem of her unbuttoned coat