a woman's dress or robe, esp. one that is full-length.

nightgown.

dressing gown.

evening gown.

a loose, flowing outer garment in any of various forms, worn by a man or woman as distinctive of office, profession, or status

an academic gown.

the student and teaching body in a university or college town.

to dress in a gown.

noun

clothes , costume , frock , garb , garment , habit