The Collaborative International Dictionary of English v.0.48:

Sawyer \Saw"yer\, n. [Saw + -yer, as in lawyer. Cf. Sawer.]
   1. One whose occupation is to saw timber into planks or
      boards, or to saw wood for fuel; a sawer.
      [1913 Webster]

   2. A tree which has fallen into a stream so that its branches
      project above the surface, rising and falling with a
      rocking or swaying motion in the current. [U.S.]
      [1913 Webster]

   3. (Zool.) The bowfin. [Local, U.S.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

sawyer
    n 1: one who is employed to saw wood
    2: any of several beetles whose larvae bore holes in dead or
       dying trees especially conifers [syn: sawyer, sawyer
       beetle]