What is the meaning of Crotchet?

A musical note one beat long in 4/4 time.

A sharp curve or crook; a shape resembling a hook

A hook-shaped instrument, especially as used in obstetric surgery.

A whim or a fancy.

A forked support; a crotch.

An indentation in the glacis of the covered way, at a point where a traverse is placed.

The arrangement of a body of troops, either forward or rearward, so as to form a line nearly perpendicular to the general line of battle.

A square bracket.

to play music in measured time

Archaic form of crochet (knit by looping)

bracket

Source: wiktionary.org