GNU Collaborative International Dictionary of English

Found one definition 

  1.       

    ‖Dictum , n.; pl. L. Dicta , E. Dictums . [L., neuter of dictus, p. p. of dicere to say. See Diction, and cf. Ditto.]
    1.  An authoritative statement; a dogmatic saying; an apothegm.
      1913 Webster
      A class of critical dicta everywhere current.
      M. Arnold.

      1913 Webster
    2. (Law) (a) A judicial opinion expressed by judges on points that do not necessarily arise in the case, and are not involved in it. (b) (French Law) The report of a judgment made by one of the judges who has given it. Bouvier. (c) An arbitrament or award.
      1913 Webster