Source : Webster's Revised Unabridged Dictionary (1913)

Consistent \Con*sist"ent\, a. [L. consistens, p. pr.: cf. F.
   consistant.]
   1. Possessing firmness or fixedness; firm; hard; solid.

            The humoral and consistent parts of the body.
                                                  --Harvey.

   2. Having agreement with itself or with something else;
      having harmony among its parts; possesing unity;
      accordant; harmonious; congruous; compatible; uniform; not
      contradictory.

            Show me one that has it in his power To act
            consistent with himself an hour.      --Pope.

            With reference to such a lord, to serve and to be
            free are terms not consistent only, but equivalent.
                                                  --South.

   3. Living or acting in conformity with one's belief or
      professions.

            It was utterly to be at once a consistent Quaker and
            a conspirator.                        --Macaulay.

Source : WordNet®

consistent
     adj 1: (sometimes followed by `with') in agreement or consistent or
            reliable; "testimony consistent with the known facts";
            "I have decided that the course of conduct which I am
            following is consistent with my sense of
            responsibility as president in time of war"- FDR [ant:
             {inconsistent}]
     2: marked by an orderly, logical, and aesthetically consistent
        relation of parts; "a logical argument"; "the orderly
        presentation" [syn: {logical}, {ordered}, {orderly}]
     3: capable of being reproduced; "astonishingly reproducible
        results can be obtained" [syn: {reproducible}] [ant: {unreproducible}]
     4: the same throughout in structure or composition; "bituminous
        coal is often treated as a consistent and homogeneous
        product" [syn: {uniform}]