Source : Webster's Revised Unabridged Dictionary (1913)

Notch \Notch\, n. [Akin to nock; cf. OD. nock, OSw. nocka. Cf.
   {Nick} a notch.]
   1. A hollow cut in anything; a nick; an indentation.

            And on the stick ten equal notches makes. --Swift.

   2. A narrow passage between two elevation; a deep, close
      pass; a defile; as, the notch of a mountain.

Notch \Notch\, v. t. [imp. & p. p. {Notched}; p. pr. & vb. n.
   {Notching}.]
   1. To cut or make notches in; to indent; also, to score by
      notches; as, to notch a stick.

   2. To fit the notch of (an arrow) to the string.

            God is all sufferance; here he doth show No arrow
            notched, only a stringless bow.       --Herrick.

Source : WordNet®

notch
     n 1: a V-shaped indentation; "mandibular notch"
     2: the location in a range of mountains of a geological
        formation that is lower than the surrounding peaks; "we
        got through the pass before it started to snow" [syn: {pass},
         {mountain pass}]
     3: a V-shaped or U-shaped indentation carved or scratched into
        a surface; "there were four notches in the handle of his
        revolver"
     4: a small cut [syn: {nick}, {snick}]
     v 1: cut or make a notch into; "notch the rope"
     2: notch a surface to record something