Definitions for nocknɒk
Random House Webster's College Dictionary
a metal or plastic piece at the end of an arrow, having a notch for the bowstring.
a notch or groove at the end of an arrow into which the bowstring fits.
a notch or groove at each end of a bow, to hold the bowstring in place.
(v.t.)to furnish with a nock.
to adjust (the arrow) to the bowstring.
Origin of nock:
1325–75; akin to D nok, LG nok(ke) tip
score, nock, mark(verb)
make small marks into the surface of
"score the clay before firing it"
Either of the two grooves in a bow that hold the bowstring.
The notch at the rear of an arrow that fits on the bowstring.
To fit an arrow against the bowstring of a bow or crossbow.
To cut a nock in (usually in an arrow's base or the tips of a bow).
Origin: "notch on a bow," late 14c., probably from a Scandinavian source (cf. Swed. nock "notch"), but cf. also Low Ger. nokk, Du. nok "tip of a sail." (source: http://www.etymonline.com/index.php?term=nock)
the upper fore corner of a boom sail or of a trysail
to notch; to fit to the string, as an arrow; to string, as a bow