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

seeker \seek"er\, n.
   1. one who seeks; that which is used in seeking or searching.
      1913 webster

   2. eccl. one of a small heterogeneous sect of the 17th
      century, in great britain, who professed to be seeking the
      true church, ministry, and sacraments.
      1913 webster

            a skeptic is ever seeking and never finds, like
            our new upstart sect of seekers.      --bullokar.
      1913 webster

[2] : WordNet (r) 2.0

seeker
     n 1: someone making a search or inquiry; "they are seekers after
          truth" syn: searcher, quester
     2: a missile equipped with a device that is attracted toward
        some kind of emission heat or light or sound or radio
        waves
see also:
searcher quester 

[3] : Moby Thesaurus II by Grady Ward, 1.0

29 moby thesaurus words for "seeker":
   applicant, aspirant, bidder, candidate, chaser, claimant, delver,
   digger, follower, hopeful, hunter, perquisitor, petitioner,
   postulant, pursuant, pursuer, quester, ransacker, research worker,
   researcher, researchist, rummager, searcher, solicitant, solicitor,
   suitor, suppliant, supplicant, zetetic

Seeker >> S Words
Seeker, definition of term: Seeker
seeker_pag1.html

Pleasure Seeker >> P Words
Pleasure Seeker, definition of term: Pleasure Seeker
pleasure+seeker_pag1.html