The Collaborative International Dictionary of English v.0.48:

Append \Ap*pend"\ ([a^]p*p[e^]nd"), v. t. [imp. & p. p.
   Appended; p. pr. & vb. n. Appending.] [L. appendere or F.
   appendre: cf. OE. appenden, apenden, to belong, OF. apendre,
   F. appendre, fr. L. append[=e]re, v. i., to hang to,
   append[e^]re, v. t., to hang to; ad + pend[=e]re, v. i., to
   hang, pend[e^]re, v. t., to hang. See Pendant.]
   1. To hang or attach to, as by a string, so that the thing is
      suspended; as, a seal appended to a record; the
      inscription was appended to the column.
      [1913 Webster]

   2. To add, as an accessory to the principal thing; to annex;
      as, notes appended to this chapter.
      [1913 Webster]

            A further purpose appended to the primary one. --I.
                                                  Taylor.
      [1913 Webster]

WordNet (r) 3.0 (2006):

append
    v 1: add to the very end; "He appended a glossary to his novel
         where he used an invented language" [syn: append, add
         on, supplement, affix]
    2: fix to; attach; "append a charm to the necklace" [syn:
       append, tag on, tack on, tack, hang on]
    3: state or say further; "`It doesn't matter,' he supplied"
       [syn: add, append, supply]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "append":
   add, adjoin, affix, agglutinate, annex, attach, burden, complicate,
   conjoin, decorate, encumber, glue on, hitch on, infix, join with,
   ornament, paste on, plus, postfix, prefix, put with, saddle with,
   slap on, subjoin, suffix, superadd, superpose, tack on, tag,
   tag on, take on, unite with