Source : Webster's Revised Unabridged Dictionary (1913)

Snub \Snub\, v. t. [imp. & p. p. {Snubbed}; p. pr. & vb. n.
   {Snubbing}.] [Cf. Icel. ssnubba to snub, chide, Sw. snubba,
   Icel. snubb[=o]ttr snubbed, nipped, and E. snib.]
   1. To clip or break off the end of; to check or stunt the
      growth of; to nop.

   2. To check, stop, or rebuke, with a tart, sarcastic reply or
      remark; to reprimand; to check. --J. Foster.

   3. To treat with contempt or neglect, as a forward or
      pretentious person; to slight designedly.

   {To snub a cable} or {rope} (Naut.), to check it suddenly in
      running out. --Totten.

Source : WordNet®

snub
     adj : unusually short; "a snub nose"
     n 1: an instance of driving away or warding off [syn: {rebuff}, {repulse}]
     2: a refusal to recognize someone you know; "the snub was
        clearly intentional" [syn: {cut}, {cold shoulder}]
     [also: {snubbing}, {snubbed}]

snub
     v 1: refuse to acknowledge; "She cut him dead at the meeting"
          [syn: {ignore}, {disregard}, {cut}]
     2: reject outright and bluntly; "She snubbed his proposal"
        [syn: {rebuff}, {repel}]
     [also: {snubbing}, {snubbed}]

snubbing
     See {snub}