The Collaborative International Dictionary of English v.0.48:

Creditor \Cred"it*or\ (kr?d"?t-?r), n. [L.: cf. F. cr?diteur.
   See Credit.]
   1. One who credits, believes, or trusts.
      [1913 Webster]

            The easy creditors of novelties.      --Daniel.
      [1913 Webster]

   2. One who gives credit in business matters; hence, one to
      whom money is due; -- correlative to debtor.
      [1913 Webster]

            Creditors have better memories than debtors.
                                                  --Franklin.
      [1913 Webster] Creditress

WordNet (r) 3.0 (2006):

creditor
    n 1: a person to whom money is owed by a debtor; someone to whom
         an obligation exists [ant: debitor, debtor]

The Devil's Dictionary (1881-1906):

CREDITOR, n.  One of a tribe of savages dwelling beyond the Financial
Straits and dreaded for their desolating incursions.