Source : Webster's Revised Unabridged Dictionary (1913)

Mop \Mop\, n. [See {Mope}.]
   A made-up face; a grimace. ``What mops and mowes it makes!''
   --Beau. & Fl.

Mop \Mop\, n. [CF. W. mop, mopa, Ir. moipal, Gael. moibeal,
   moibean; or OF. mappe a napkin (see {Map}, {Napkin}).]
   1. An implement for washing floors, or the like, made of a
      piece of cloth, or a collection of thrums, or coarse yarn,
      fastened to a handle.

   2. A fair where servants are hired. [Prov. Eng.]

   3. The young of any animal; also, a young girl; a moppet.
      [Prov. Eng.] --Halliwell.

   {Mop head}.
      (a) The end of a mop, to which the thrums or rags are
          fastened.
      (b) A clamp for holding the thrums or rags of a mop.
          [U.S.]

Mop \Mop\, v. i.
   To make a wry mouth. [Obs.] --Shak.

Mop \Mop\, v. t. [imp. & p. p. {Mopped}; p. pr. & vb. n.
   {Mopping}.]
   To rub or wipe with a mop, or as with a mop; as, to mop a
   floor; to mop one's face with a handkerchief.

Source : WordNet®

mop
     v 1: to wash or wipe with or as if with a mop; "Mop the hallway
          now"; "He mopped her forehead with a towel" [syn: {wipe
          up}, {mop up}]
     2: make a sad face and thrust out one's lower lip; "mop and
        mow"; "The girl pouted" [syn: {pout}, {mow}]
     [also: {mopping}, {mopped}]

mop
     n : cleaning implement consisting of absorbent material fastened
         to a handle; for cleaning floors [syn: {swab}, {swob}]
     [also: {mopping}, {mopped}]