Source : Webster's Revised Unabridged Dictionary (1913)

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

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

   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.

   3. One who surveys or measures land; one who practices the
      art of surveying.

   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.

   {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}.

Source : WordNet®

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