The Collaborative International Dictionary of English v.0.48:

Surveyor \Sur*vey"or\, n.
   1. One placed to superintend others; an overseer; an
      inspector.
      [1913 Webster]

            Were 't not madness then,
            To make the fox surveyor of the fold? --Shak.
      [1913 Webster]

   2. One who views and examines for the purpose of ascertaining
      the condition, quantity, or quality of anything; as, a
      surveyor of highways, ordnance, etc.
      [1913 Webster]

   3. One who surveys or measures land; one who practices the
      art of surveying.
      [1913 Webster]

   4. (Customs)
      (a) An officer who ascertains the contents of casks, and
          the quantity of liquors subject to duty; a gauger.
      (b) In the United States, an officer whose duties include
          the various measures to be taken for ascertaining the
          quantity, condition, and value of merchandise brought
          into a port. --Abbot.
          [1913 Webster]

   Surveyor general.
      (a) A principal surveyor; as, the surveyor general of the
          king's manors, or of woods and parks. [Eng.]
      (b) An officer having charge of the survey of the public
          lands of a land district. [U.S.] --Davies & Peck
          (Math. Dict.).

   Surveyor's compass. See Circumferentor.

   Surveyor's level. See under Level.
      [1913 Webster]

WordNet (r) 3.0 (2006):

surveyor
    n 1: an engineer who determines the boundaries and elevations of
         land or structures
    2: someone who conducts a statistical survey

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "surveyor":
   Big Brother, appraiser, assayer, assessor, auditor, boatswain,
   boss, cartographer, chief, chorographer, comptroller, controller,
   estimator, evaluator, floor manager, floorman, floorwalker,
   foreman, gaffer, ganger, gauger, geodesist, head, headman,
   inspector, land surveyor, measurer, meter, monitor,
   noncommissioned officer, oceanographer, overman, overseer, proctor,
   sirdar, slave driver, straw boss, subforeman, super,
   superintendent, supervisor, taskmaster, topographer, valuator,
   valuer, visitor