The Collaborative International Dictionary of English v.0.48:

Legislate \Leg"is*late\ (l[e^]j"[i^]s*l[=a]t), v. i. [imp. & p.
   p. Legislated (-l[=a]`t[e^]d); p. pr. & vb. n.
   Legislating (-l[=a]`t[i^]ng).] [See Legislator.]
   To make or enact a law or laws.
   [1913 Webster]

         Solon, in legislating for the Athenians, had an idea of
         a more perfect constitution than he gave them. --Bp.
                                                  Watson (1805).
   [1913 Webster]

WordNet (r) 3.0 (2006):

legislate
    v 1: make laws, bills, etc. or bring into effect by legislation;
         "They passed the amendment"; "We cannot legislate how
         people spend their free time" [syn: legislate, pass]

Moby Thesaurus II by Grady Ward, 1.0:

36 Moby Thesaurus words for "legislate":
   authorize, constitute, declare lawful, decree, enact, enact laws,
   establish, filibuster, formulate, get the floor, have the floor,
   kill, legalize, legitimate, legitimatize, legitimize,
   lobby through, logroll, make a regulation, make legal, ordain,
   pass, pigeonhole, pocket, prescribe, put in force, put through,
   railroad through, regulate, roll logs, sanction, table,
   take the floor, validate, veto, yield the floor