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

subscriber \subscrib"er\, n.
   1. one who subscribes; one who contributes to an undertaking
      by subscribing.
      1913 webster

   2. one who enters his name for a paper, book, map, or the
      like. --dryden.
      1913 webster

[2] : WordNet (r) 2.0

subscriber
     n 1: someone who expresses strong approval syn: endorser, indorser,
           ratifier
     2: someone who contracts to receive and pay for a certain
        number of issues of a publication syn: reader
     3: someone who contributes or promises to contribute a sum of
        money syn: contributor
see also:
endorser indorser ratifier reader contributor 

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

49 moby thesaurus words for "subscriber":
   maecenas, santa claus, almoner, almsgiver, angel, approver,
   assignor, awarder, backer, bestower, certifier, cheerful giver,
   conferrer, confirmer, consignor, contributor, cosignatory,
   cosigner, donator, donor, endorser, fairy godmother, feoffor,
   financer, funder, giver, grantor, guarantor, imparter, insurer,
   lady bountiful, notary, notary public, party, patron, patroness,
   philanthropist, presenter, ratifier, settler, signatory,
   sugar daddy, supporter, testate, testator, testatrix, underwriter,
   upholder, vouchsafer

Subscriber >> S Words
Subscriber, definition of term: Subscriber
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