1. a group of three people or things
2. the Christian doctrine of the Father, Son, and Holy Spirit as three persons in one God
Usage: Christianity; capitalized when referring to Christian doctrine

Examples

• The trinity of friends had been inseparable since childhood.
• She studied the trinity of mind, body, and spirit in her philosophy class.
• The Trinity is a central belief in most Christian denominations.
• The artist created a trinity of sculptures representing past, present, and future.
• Many Christians pray to the Trinity during worship services.
• The book explored the trinity of love, hope, and faith.