Source : Webster's Revised Unabridged Dictionary (1913)

Trundle \Trun"dle\, n. [AS. tryndel a little shield. See
   {Trend}, v. i.]
   1. A round body; a little wheel.

   2. A lind of low-wheeled cart; a truck.

   3. A motion as of something moving upon little wheels or
      rollers; a rolling motion.

   4. (Mach.)
      (a) A lantern wheel. See under {Lantern}.
      (b) One of the bars of a lantern wheel.

Trundle \Trun"dle\, v. t. [imp. & p. p. {Trundled}; p. pr. & vb.
   n. {Trundling}.]
   1. To roll (a thing) on little wheels; as, to trundle a bed
      or a gun carriage.

   2. To cause to roll or revolve; to roll along; as, to trundle
      a hoop or a ball. --R. A. Proctor.

Trundle \Trun"dle\, v. i.
   1. To go or move on small wheels; as, a bed trundles under
      another.

   2. To roll, or go by revolving, as a hoop.

Source : WordNet®

trundle
     n 1: a low bed to be slid under a higher bed [syn: {trundle bed},
           {truckle bed}, {truckle}]
     2: small wheel or roller
     v : move heavily; "the streetcar trundled down the avenue"