trinity Meaning, Definition & Usage

  1. noun the cardinal number that is the sum of one and one and one
    deuce-ace; trio; triplet; tercet; tierce; troika; three; trey; 3; ternion; trine; ternary; triad; threesome; leash; III; terzetto.
  2. noun the union of the Father and Son and Holy Ghost in one Godhead
    Sacred Trinity; Holy Trinity; Blessed Trinity.
  3. noun three people considered as a unit
    threesome; trio; triad.

WordNet

Trin"i*ty noun
Etymology
OE. trinitee, F. trinité, L. trinitas, fr. trini three each. See Trinal.
Definitions
  1. (Christian Theol.) The union of three persons (the Father, the Son, and the Holy Ghost) in one Godhead, so that all the three are one God as to substance, but three persons as to individuality.
  2. Any union of three in one; three units treated as one; a triad, as the Hindoo trinity, or Trimurti.
  3. Any symbol of the Trinity employed in Christian art, especially the triangle.

Webster 1913