The Collaborative International Dictionary of English v.0.48:

Legislator \Leg"is*la`tor\ (l[e^]j"[i^]s*l[=a]`t[~e]r), n. [L.
   legis lator, prop., a proposer of a law; lex, legis, law +
   lator a proposer, bearer, fr. latus, used as p. p. of ferre
   to bear: cf. F. l['e]gislateur. See Legal, and Tolerate.]
   A lawgiver; one who makes laws for a state or community; a
   member of a legislative body.
   [1913 Webster]

         The legislators in ancient and heroical times. --Bacon.
   [1913 Webster]

         Many of the legislators themselves had taken an oath of
         abjuration of his Majesty's person and family. --E.
                                                  Phillips.
   [1913 Webster]

WordNet (r) 3.0 (2006):

legislator
    n 1: someone who makes or enacts laws

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "legislator":
   MP, Member of Congress, Member of Parliament, alderman, archon,
   assemblyman, bailie, burghermaster, burgomaster, cabinet member,
   cabinet minister, chancellor, chosen freeholder, city councilman,
   city father, city manager, commissar, commissioner, congressman,
   congresswoman, councillor, councilman, councilwoman,
   county commissioner, county supervisor, elder, floor leader,
   headman, induna, lawgiver, lawmaker, lord mayor, magistrate, maire,
   majority leader, mayor, minister, minister of state,
   minority leader, party whip, portreeve, reeve, representative,
   secretary, secretary of state, selectman, senator, solon,
   state senator, supervisor, syndic, undersecretary, warden, whip