Definitions:

1. a joint of a finger when the fist is closed noun
   • The fighter's knuckles hurt after the cage match.
2. to press or rub with the knuckles verb
   • Can you knuckle my shoulders?
3. to shoot a marble while keeping one's knuckles on the ground verb
   • I knuckle marbles.

Synonyms:

• knuckle joint

NearBy Words:

• knuckleball
• knucklebones
• knucklehead
• knuckler
• knuckles