The Collaborative International Dictionary of English v.0.48:

Ratify \Rat"i*fy\ (r[a^]t"[i^]*f[imac]), v. t. [imp. & p. p.
   Ratified (r[a^]t"[i^]*f[imac]d); p. pr. & vb. n.
   Ratifying (r[a^]t"[i^]*f[imac]`[i^]ng).] [F. ratifier, fr.
   L. ratus fixed by calculation, firm, valid + -ficare (in
   comp.) to make. See Rate, n., and -fy.]
   To approve and sanction; to make valid; to confirm; to
   establish; to settle; especially, to give sanction to, as
   something done by an agent or servant; as, to ratify an
   agreement, treaty, or contract; to ratify a nomination.
   [1913 Webster]

         It is impossible for the divine power to set a seal to
         a lie by ratifying an imposture with such a miracle.
                                                  --South.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ratified
    adj 1: formally approved and invested with legal authority [syn:
           ratified, sanctioned]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "ratified":
   accepted, acknowledged, admitted, adopted, affirmed, allowed,
   appointed, approved, authenticated, avowed, carried, certified,
   chosen, conceded, confessed, confirmed, countersigned, designated,
   elect, elected, elected by acclamation, embraced, endorsed,
   espoused, granted, handpicked, named, nominated, notarized, passed,
   picked, professed, received, recognized, sealed, select, selected,
   signed, stamped, sworn and affirmed, sworn to, unanimously elected,
   underwritten, validated, warranted