Learn how to say Trinity correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word trinity:
noun (plural trinities)
(the Trinity or the Holy Trinity) the three persons of the Christian Godhead; Father, Son, and Holy Spirit.
a group of three people or things:
the wine was the first of a trinity of three excellent vintages
[mass noun] the state of being three:
God is said to be trinity in unity
Middle English: from Old French trinite, from Latin trinitas ‘triad’, from trinus ‘threefold’ (see trine)