noun. A group consisting of three closely related members.

noun. In most Christian faiths, the union of three divine persons, the Father, Son, and Holy Spirit, in one God.

noun. Trinity Sunday.

noun. The condition of being three; threeness.

noun. A set or group of three; a triad; a trio; a trine.

noun. [capitalized] The union of three persons—Father, Son, and Holy Spirit—in one Godhead; the threefold personality of the one divine being.

noun. A symbolical representation of the mystery of the Trinity, frequent in Christian art.

noun. In heraldry, a bearing compounded of an orle, a pall, and four roundels, three at the angles of the orle where the bands of the pall meet it, the fourth at the intersection of the bands of the pall.

noun. 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.

noun. Any union of three in one; three units treated as one; a triad, as the Hindu trinity, or Trimurti.

noun. Any symbol of the Trinity employed in Christian art, especially the triangle.

noun. an institution in London for promoting commerce and navigation, by licensing pilots, ordering and erecting beacons, and the like.

noun. the Sunday next after Whitsunday; -- so called from the feast held on that day in honor of the Holy Trinity.

noun. See the Note under Term, n., 5.

noun. A group or set of three people or things; triad; trio; trine.

noun. The state of being three; threeness.

noun. three people considered as a unit

noun. the cardinal number that is the sum of one and one and one

noun. the union of the Father and Son and Holy Ghost in one Godhead