Source : Webster's Revised Unabridged Dictionary (1913)

Subscriber \Sub*scrib"er\, n.
   1. One who subscribes; one who contributes to an undertaking
      by subscribing.

   2. One who enters his name for a paper, book, map, or the
      like. --Dryden.

Source : WordNet®

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}]