Source : Webster's Revised Unabridged Dictionary (1913)

Reem \Reem\, v. t. [Cf. {Ream} to make a hole in.] (Naut.)
   To open (the seams of a vessel's planking) for the purpose of
   calking them.

   {Reeming iron} (Naut.), an iron chisel for reeming the seams
      of planks in calking ships.