trinity
n. countablen. a group of three things or people that belong together. In the Christian religion, it refers to the Father, the Son, and the Holy Spirit as one God.
n. a group of three closely related people or things. When capitalised, it refers specifically to the Christian doctrine of the union of the Father, Son, and Holy Spirit in one Godhead.
The band is a trinity of guitar, bass, and drums.
The legal system relies on a trinity of powers: the legislature, the executive, and the judiciary.
The philosopher argued that the human experience is a trinity of mind, body, and spirit, where no single element can be understood in isolation from the others.
See trinity.
Usually capitalised when referring to the religious concept; lowercase for general groups of three.