ADJECTIVE (3)

1. relating to or having the nature of a parliament;
- Example: "parliamentary reform"
- Example: "a parliamentary body"

2. having the supreme legislative power resting with a body of cabinet ministers chosen from and responsible to the legislature or parliament;
- Example: "parliamentary government"

3. in accord with rules and customs of a legislative or deliberative assembly;
- Example: "parliamentary law"

The Collaborative International Dictionary of English v.0.48:

Parliamentary \Par`lia*men"ta*ry\, a. [Cf. F. parlementaire.]
   [1913 Webster]
   1. Of or pertaining to Parliament; as, parliamentary
      authority. --Bacon.
      [1913 Webster]

   2. Enacted or done by Parliament; as, a parliamentary act.
      --Sir M. Hale.
      [1913 Webster]

   3. According to the rules and usages of Parliament or of
      deliberative bodies; as, a parliamentary motion;
      parliamentary order; parliamentary procedure.
      [1913 Webster +PJC]

   Parliamentary agent, a person, usually a solicitor,
      professionally employed by private parties to explain and
      recommend claims, bills, etc., under consideration of
      Parliament. [Eng.]

   Parliamentary train, one of the trains which, by act of
      Parliament, railway companies are required to run for the
      conveyance of third-class passengers at a reduced rate.
      [Eng.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

parliamentary
    adj 1: relating to or having the nature of a parliament;
           "parliamentary reform"; "a parliamentary body"
    2: having the supreme legislative power resting with a body of
       cabinet ministers chosen from and responsible to the
       legislature or parliament; "parliamentary government"
    3: in accord with rules and customs of a legislative or
       deliberative assembly; "parliamentary law"

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "parliamentary":
   absolute, aristocratic, authoritarian, autocratic, autonomous,
   bicameral, bureaucratic, civic, civil, conforming, conformist,
   congressional, constitutional, deliberative, democratic, despotic,
   dictatorial, fascist, federal, federalist, federalistic, formal,
   governmental, gubernatorial, heteronomous, lawmaking, legislative,
   legislatorial, matriarchal, matriarchic, monarchal, monarchial,
   monarchic, monocratic, official, oligarchal, oligarchic, ordered,
   orderly, parliamentarian, patriarchal, patriarchic, pluralistic,
   political, procedural, republican, self-governing, senatorial,
   theocratic, totalitarian, unicameral