triv•i•alPronunciation: (triv\u0027E-ul), [key] —adj. 1. of very little importance or value; insignificant: Don\u0027t bother me with trivial matters. 2. commonplace; ordinary. 3. Biol.(of names of organisms) specific, as distinguished from generic. 4. Math. a. noting a solution of an equation in which the value of every variable of the equation is equal to zero. b. (of a theorem, proof, or the like) simple, transparent, or immediately evident. 5. Chem.(of names of chemical compounds) derived from the natural source, or of historic origin, and not according to the systematic nomenclature: Picric acid is the trivial name of 2,4,6-trinitrophenol.