Trin·​i·​ty ˈtri-nə-tē How to pronounce Trinity (audio)
: the unity of Father, Son, and Holy Spirit as three persons in one Godhead according to Christian dogma
not capitalized : a group of three closely related persons or things
or Trinity Sunday : the Sunday after Whitsunday observed as a feast in honor of the Trinity

Did you know?

The nature of the Trinity (or Holy Trinity) has caused centuries of argument and division within the Christian faith. The word doesn't actually appear in the Bible itself, but the New Testament does speak of the Father, Son, and Holy Spirit together; the Father is understood as the protector of the Jews, the Son as the savior of mankind, and the Holy Spirit as the preserver of the church. Almost all the major Christian sects may be called trinitarian. The island of Trinidad is one of many places named with the Spanish translation of Trinity.

Word History


Middle English trinite, from Anglo-French trinité, from Late Latin trinitat-, trinitas state of being threefold, from Latin trinus threefold

First Known Use

13th century, in the meaning defined at sense 1

Time Traveler
The first known use of Trinity was in the 13th century

Dictionary Entries Near Trinity

Cite this Entry

“Trinity.” Dictionary, Merriam-Webster, Accessed 25 Mar. 2023.

Kids Definition


plural trinities
capitalized : the unity of Father, Son, and Holy Spirit existing as three persons in one Godhead according to some Christian doctrines

Geographical Definition


geographical name

Trin·​i·​ty ˈtri-nə-tē How to pronounce Trinity (audio)
river in eastern Texas flowing southeast into Galveston Bay

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