ternary(noun, adjective) adjective1. having three units or components or elements- a ternary operationSimilar word(s): multiple, treble, triple, triplexSentences with ternary as an adjective:- Sodic hydroxide, NaOH, is a ternary compound. noun1. the cardinal number that is the sum of one and one and oneSimilar word(s): leash, tercet, ternion, terzetto, three, tierce, trey, triad, trine, trinity, trio, triplet, troikaDefinition categories: quantity, digit, figure