gown

gown /ˈgaʊn/ noun
plural gowns
gown
/ˈgaʊn/
noun
plural gowns
Britannica Dictionary definition of GOWN
[count]
1 
: a long, formal dress that a woman wears especially during a special event
2 
: a loose piece of clothing that covers most of the body
— see also dressing gown, nightgown
3 
: a loose piece of clothing that is worn over other clothes during an official event by a judge, a priest, a student, etc.