Webster's Revised Unabridged Dictionary · 1913

Frock

Frock (frok) , noun

[French froc a monk's cowl, coat, garment, Late Latin frocus, froccus, flocus, floccus, from Latin floccus a flock of wool; hence orig., a flocky cloth or garment; compare Latin flaccus flabby, English flaccid.]

1.
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.
2.
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.
Collocations (2)
Frock coat , a body coat for men, usually double-breasted, the skirts not being in one piece with the body, but sewed on so as to be somewhat full.
Smock frock , See in the Vocabulary.

Frock , transitive verb

1.
To clothe in a frock.
2.
To make a monk of. Compare Unfrock.