trinity

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

n 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

n 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

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