If you mean the female dress, it is simply called "robe", just as a normal dress.
It could also be "robe du soir" for a party frock.
gown
frock = vestido
Sam Frock was born on 1882-12-23.
Sam Frock died on 1925-11-03.
Bill's New Frock was created in 1989.
Frock Me - 2008 is rated/received certificates of: Australia:M
Bill's New Frock has 160 pages.
A frock is something a transvestite wears. And a dress is something a woman wears.
jayne wore pink frock at her birthday adjectives awnser
rock
I really liked my friends dress so I told her "that's a nice frock you're wearing."
A linsey frock is a medium lenth jacket of strong coarse fabric like a mixture of linen and wool.