noun

• A group or set of three people or things; three things combined into one.
• The state of being three; independence of three things; things divided into three.
• (Christianity) In Christian belief, the three persons (personae) of the Godhead: Father, Son and Holy Spirit.
• A female given name from English used since the 1970s, from the religious term trinity, or translated from its long-established Spanish equivalent.
• A male given name
• A small coastal town in Newfoundland, Newfoundland and Labrador, Canada.
• A town in Alabama.
• A city in North Carolina.
• A city and town in Texas.
• The world's first nuclear explosion: a nuclear test on July 16, 1945, in New Mexico.
• (UK, Ireland, law, education) Ellipsis of Trinity term. [(law) The fourth and final term of the legal year, running from May to July, during which the upper courts of England and Wales, and Ireland, sit to hear cases.]
• (Cambridge University, informal) Ellipsis of Trinity College, Cambridge.
• (Oxford University, informal) Ellipsis of Trinity College, Oxford.