Source : Webster's Revised Unabridged Dictionary (1913)

Trivial \Triv"i*al\, a. [L. trivialis, properly, that is in, or
   belongs to, the crossroads or public streets; hence, that may
   be found everywhere, common, fr. trivium a place where three
   roads meet, a crossroad, the public street; tri- (see {Tri-})
   + via a way: cf. F. trivial. See {Voyage}.]
   1. Found anywhere; common. [Obs.]

   2. Ordinary; commonplace; trifling; vulgar.

            As a scholar, meantime, he was trivial, and
            incapable of labor.                   --De Quincey.

   3. Of little worth or importance; inconsiderable; trifling;
      petty; paltry; as, a trivial subject or affair.

            The trivial round, the common task.   --Keble.

   4. Of or pertaining to the trivium.

   {Trivial name} (Nat. Hist.), the specific name.