The Collaborative International Dictionary of English v.0.48:

Subscribe \Sub*scribe"\, v. t. [imp. & p. p. Subscribed; p.
   pr. & vb. n. Subscribing.] [L. subscribere, subscriptum;
   sub under + scribere to write: cf. F. souscrire. See
   Scribe.]
   1. To write underneath, as one's name; to sign (one's name)
      to a document.
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            [They] subscribed their names under them. --Sir T.
                                                  More.
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   2. To sign with one's own hand; to give consent to, as
      something written, or to bind one's self to the terms of,
      by writing one's name beneath; as, parties subscribe a
      covenant or contract; a man subscribes a bond.
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            All the bishops subscribed the sentence. --Milman.
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   3. To attest by writing one's name beneath; as, officers
      subscribe their official acts, and secretaries and clerks
      subscribe copies or records.
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   4. To promise to give, by writing one's name with the amount;
      as, each man subscribed ten dollars.
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   5. To sign away; to yield; to surrender. [Obs.] --Shak.
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   6. To declare over one's signature; to publish. [Obs.]
      [1913 Webster]

            Either or must shortly hear from him, or I will
            subscribe him a coward.               --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

subscribed
    adj 1: (of a contract or will or other document) having a
           signature written at the end; "the subscribed will"