Definitions
1.nounA group of three things; a trio, threesome or tierce.
2.nounThe Holy Trinity.
3.adjectiveMade up of three things; treble, triadic, triple, triplex.
4.adjectiveArranged in groups of three.
5.adjectiveTo the base three.
6.adjectiveHaving three variables.
7.adjectiveContaining, or consisting of, three different parts, as elements, atoms, groups, or radicals, which are regarded as having different functions or relations in the molecule."Sodic hydroxide, NaOH, is a ternary compound."