[1] : The Collaborative International Dictionary of English v.0.48

searcher \search"er\, n. cf. of. cercheor inspector.
   one who, or that which, searches or examines; a seeker; an
   inquirer; an examiner; a trier. specifically:
   a formerly, an officer in london appointed to examine the
       bodies of the dead, and report the cause of death.
       --graunt.
   b an officer of the customs whose business it is to search
       ships, merchandise, luggage, etc.
   c an inspector of leather. prov. eng.
   d gun. an instrument for examining the bore of a cannon,
       to detect cavities.
   e an implement for sampling butter; a butter trier.
   j med. an instrument for feeling after calculi in the
       bladder, etc.
       1913 webster

[2] : WordNet (r) 2.0

searcher
     n 1: someone making a search or inquiry; "they are seekers after
          truth" syn: seeker, quester
     2: a customs official whose job is to search baggage or goods
        or vehicles for contraband or dutiable items
     3: large metallic blue-green beetle that preys on caterpillars;
        found in north america syn: searcher beetle, calosoma
        scrutator
see also:
seeker quester searcher beetle calosoma scrutator 

[3] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

searcher, eng. law. an officer of the customs, whose duty it is to examine 
and search all ships outward bound, to ascertain whether they have any 
prohibited or uncustomed goods on board. 

Searcher >> S Words
Searcher, definition of term: Searcher
searcher_pag1.html