What is the meaning of Frock?

A dress, a piece of clothing, which consists of a skirt and a cover for the upper body.

An outer garment worn by priests and other clericals; a habit.

A sailor's jersey.

An undress regimental coat.

To clothe (somebody) in a frock.

To make (somebody) a cleric.

To grant to an officer the title and uniform of a rank he will soon be promoted to.

A frog.

Source: wiktionary.org