Definition of frock

• n. - A loose outer garment; especially, a gown forming a part of European modern costume for women and children; also, a coarse shirtlike garment worn by some workmen over their other clothes; a smock frock; as, a marketman's frock.
• n. - A coarse gown worn by monks or friars, and supposed to take the place of all, or nearly all, other garments. It has a hood which can be drawn over the head at pleasure, and is girded by a cord.
• v. t. - To clothe in a frock.
• v. t. - To make a monk of. Cf. Unfrock.