The word "trinity" refers to a group of three, also called a triad or triunity. A trinity group consists of three closely related members, either people or things. For example, a committee of three members can be called a trinity.
In Christian doctrine, the word "trinity" refers to the Holy Trinity of the Father, Son (Jesus) and Holy Spirit. In this Christian belief, one divine being or godhead consists of three entities and personalities, each distinct and fully divine but existing as one.
As a given name, Trinity expresses a biblical connotation and can be used for either a boy's or girl's name. Trinity ranks 62nd among the most popular girls' names for babies born between 2000 to 2009, according to the U.S. Social Security Administration.