Source : Webster's Revised Unabridged Dictionary (1913)

Poler \Pol"er\, n.
   One who poles.

Poler \Pol"er\, n.
   An extortioner. See {Poller}. [Obs.] --Bacon.

Source : WordNet®

poler
     n : a draft horse harnessed alongside the shaft or pole of a
         vehicle [syn: {pole horse}]