The Collaborative International Dictionary of English v.0.48:

Dub \Dub\ (d[u^]b), v. t. [imp. & p. p. Dubbed (d[u^]bd); p.
   pr. & vb. n. Dubbing.] [AS. dubban to strike, beat
   ("dubbade his sunu . . . to r[imac]dere." --AS. Chron. an.
   1086); akin to Icel. dubba; cf. OF. adouber (prob. fr. Icel.)
   a chevalier, Icel. dubba til riddara.]
   1. To confer knighthood upon; as, the king dubbed his son
      Henry a knight.
      [1913 Webster]

   Note: The conclusion of the ceremony was marked by a tap on
         the shoulder with the sword.
         [1913 Webster]

   2. To invest with any dignity or new character; to entitle;
      to call.
      [1913 Webster]

            A man of wealth is dubbed a man of worth. --Pope.
      [1913 Webster]

   3. To clothe or invest; to ornament; to adorn. [Obs.]
      [1913 Webster]

            His diadem was dropped down
            Dubbed with stones.                   --Morte
                                                  d'Arthure.
      [1913 Webster]

   4. To strike, rub, or dress smooth; to dab; as:
      (a) To dress with an adz; as, to dub a stick of timber
          smooth.
          [1913 Webster]
      (b) To strike cloth with teasels to raise a nap.
          --Halliwell.
      (c) To rub or dress with grease, as leather in the process
          of cyrrying it. --Tomlinson.
      (d) To prepare for fighting, as a gamecock, by trimming
          the hackles and cutting off the comb and wattles.
          [1913 Webster]

   To dub a fly, to dress a fishing fly. [Prov. Eng.]
      --Halliwell.

   To dub out (Plastering), to fill out, as an uneven surface,
      to a plane, or to carry out a series of small projections.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dub \Dub\ (d[u^]b), v. i.
   To make a noise by brisk drumbeats. "Now the drum dubs."
   --Beau. & Fl.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dub \Dub\ (d[u^]b), v. t.
   1. to add sound to an existing recording, audio or video; --
      often used with in. The sound may be of any type or of any
      duration.
      [PJC]

   2. to mix together two or more sound or video recordings to
      produce a composite recording.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Dub \Dub\, n.
   A blow. [R.] --Hudibras.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dub \Dub\, n. [Cf. Ir. d['o]b mire, stream, W. dwvr water.]
   A pool or puddle. [Prov. Eng.] --Halliwell.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dubb \Dubb\, n. [Ar.] (Zool.)
   The Syrian bear. See under Bear. [Written also dhubb, and
   dub.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

dub
    n 1: the new sounds added by dubbing
    v 1: give a nickname to [syn: dub, nickname]
    2: provide (movies) with a soundtrack of a foreign language
    3: raise (someone) to knighthood; "The Beatles were knighted"
       [syn: knight, dub]