crotchet UK /ˈkɹɒtʃ.ɪt/US /ˈkɹɑt͡ʃ.ɪt/noun 8verb 1forms 3 noun8 •A musical note one beat long in 4/4 time.The crotchets and quavers are dancing up and down the stave like little black boys on a fence. — 1920 •A square bracket. •(historical) A hook-shaped instrument, especially as used in obstetric surgery.Either Doctor Denman or an old Woman would have waited—but since the horrid death-doing Crotchet has been found out, & its use permitted—Oh! many & many a Life has been flung away. — 1797 •A forked support; a crotch. •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. •(historical) An indentation in the glacis of the covered way, at a point where a traverse is placed. •(no longer used) A sharp curve or crook; a shape resembling a hook •(no longer used) A whim or a fancy.He ruined himself and all that trusted in him by crotchets that he could never explain to any rational man. — 1847 verb1 •(no longer used) to play music in measured time formscrotcheted · crotcheting · crotchets