nock Syllabification: (nock)Pronunciation: /näk/Definition of nock noun Archery a notch at either end of a bow for holding the string. a notch at the back end of an arrow into which the bowstring fits. verb [with object] fit (an arrow) to the bowstring to ready it for shooting. Origin: late Middle English: perhaps from Middle Dutch nocke 'point, tip'nock in other Oxford dictionaries Definition of nock in the British & World English dictionary