The Collaborative International Dictionary of English v.0.48:

Limit \Lim"it\ (l[i^]m"[i^]t), v. t. [imp. & p. p. Limited; p.
   pr. & vb. n. Limiting.] [F. limiter, L. limitare, fr.
   limes, limitis, limit; prob. akin to limen threshold, E.
   eliminate; cf. L. limus sidelong.]
   To apply a limit to, or set a limit for; to terminate,
   circumscribe, or restrict, by a limit or limits; as, to limit
   the acreage of a crop; to limit the issue of paper money; to
   limit one's ambitions or aspirations; to limit the meaning of
   a word.
   [1913 Webster]

   Limiting parallels (Astron.), those parallels of latitude
      between which only an occultation of a star or planet by
      the moon, in a given case, can occur.
      [1913 Webster]

WordNet (r) 3.0 (2006):

limiting
    adj 1: restricting the scope or freedom of action [syn:
           confining, constraining, constrictive, limiting,
           restricting]
    2: strictly limiting the reference of a modified word or phrase;
       "the restrictive clause in `Each made a list of the books
       that had influenced him' limits the books on the list to only
       those particular ones defined by the clause"
    n 1: the grammatical relation that exists when a word qualifies
         the meaning of the phrase [syn: modification,
         qualifying, limiting]

Moby Thesaurus II by Grady Ward, 1.0:

62 Moby Thesaurus words for "limiting":
   altering, assuasive, bordering, borderline, boundary, bounding,
   caudal, claustral, coastal, conclusive, confining, cramping,
   defining, definitive, determinant, determinative, determining,
   enclosing, endmost, eventual, exclusive, extenuating, extenuatory,
   extreme, farthest, final, fringing, frontier, last, lenitive,
   limbic, liminal, limit, limitary, limitative, littoral, marginal,
   mitigating, mitigative, mitigatory, modificatory, modifying,
   modulatory, narrowing, palliative, parietal, polar, qualificative,
   qualificatory, qualifying, restricting, restrictive, rimming,
   skirting, softening, surrounding, tail, terminal, terminating,
   terminative, threshold, ultimate