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.-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.-to clothe in a frock.-to make a monk of.  cf. unfrock.