gown (gowns plural )
1 n-count A gown is a dress, usually a long dress, which women wear on formal occasions.
The new ball gown was a great success.
2 n-count A gown is a loose black garment worn on formal occasions by people such as lawyers and academics. ...an old headmaster in a flowing black gown.
dressing gown (dressing gowns plural ), dressing-gown A dressing gown is a long, loose garment which you wear over your night clothes when you are not in bed. n-count