The word is cognate to similar words in other Germanic languages, such as the Dutch "knokkel" (knuckle) or German "Knöchel" (ankle), i.e., Knöchlein, the diminutive of the German word for bone …

The meaning of KNUCKLE is the rounded prominence formed by the ends of the two adjacent bones at a joint —used especially of those at the joints of the fingers.

KNUCKLE definition: 1. one of the joints in the hand where your fingers bend, especially where your fingers join on to…. Learn more.

something resembling a knuckle, as any of the projecting, cylindrical parts through which a pin is passed to form a hinge

Nov 30, 2025 · A contrivance, usually of brass or iron, and furnished with points, worn to protect the hand, to add force to a blow, and to disfigure the person struck; a knuckle duster.

Define knuckle. knuckle synonyms, knuckle pronunciation, knuckle translation, English dictionary definition of knuckle. n. 1. a. The prominence of the dorsal aspect of a joint of a finger, especially of …

n. Anatomy [countable] any joint of a finger, esp. where a finger bends, or where a finger meets the hand. v. knuckle down, [no object] to apply oneself with energy; to work earnestly; become serious. …

Definition of knuckle noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

(Definition of knuckle from the Cambridge Learner's Dictionary © Cambridge University Press)

KNUCKLE meaning: 1. one of the joints in the hand where your fingers bend, especially where your fingers join on to…. Learn more.