trinity

/ˈtrɪnədi/

Other forms: trinities

A trinity is a unit made up of three — like the famous Christian trinity of the Father, the Son, and the Holy Spirit.

The prefix tri — which can also be found in triangle — is a clue that this word has to do with the number three. If three people are in charge of a project together, they could be considered a trinity, and a three-person band could be called a trinity.

Definitions of trinity

1. noun

   three people considered as a unit
   synonyms: threesome, triad, trio

   types:

   triumvirate

   a group of three men responsible for public administration or civil authority

   troika

   a modern Russian triumvirate

   type of:

   assemblage, gathering

   a group of persons together in one place
2. noun

   the cardinal number that is the sum of one and one and one
   synonyms: 3, III, deuce-ace, leash, tercet, ternary, ternion, terzetto, three, threesome, tierce, trey, triad, trine, trio, triplet, troika

   type of:

   digit, figure

   one of the elements that collectively form a system of numeration