Definition of Unitarian in US English:



  • 1A person, especially a Christian, who asserts the unity of God and rejects the doctrine of the Trinity.

    • ‘My inner Unitarian opines that therein lies a critical difference between convert and cradle Catholic.’
    1. 1.1 A member of a church or religious body maintaining Unitarian beliefs and typically rejecting formal dogma in favor of a rationalist approach to belief.
      • ‘This was also true for the Protestant denominations, including the Methodists, Presbyterians, Congregationalists, Unitarians, Baptists, and Quakers.’
      • ‘Both allowed the very young a certain exemption from the adult rules of religious belief and behavior; spiritually speaking, for rationalist Unitarians and evangelicals, children were a different order of moral being than adults.’
      • ‘When these ideas spread from Great Britain to the United States after the Civil War, they were initially adopted by proponents of the social gospel, usually Unitarians, liberal Congregationalists and Baptists, and Episcopalians.’
      • ‘A group of dissatisfied Unitarians who thinks its church has become too political will change its name in order to settle a suit filed by the national church.’
      • ‘Other denominations include the Czech Orthodox Church, the Old Catholic Church, the Unitarians, and the Federation of Jewish Communities in the Czech Republic.’


  • Relating to the Unitarians.

    • ‘In a larger practical sense, however, evangelical revivalism shared basically Unitarian assumptions about the moral autonomy of children.’
    • ‘She now volunteers for the American Red Cross, plays piano for Unitarian services, trains her dressage horse, and basks in the views of her lovely new surroundings.’
    • ‘One figure acted as a lightning rod for Unitarian convictions.’
    • ‘If clergy weren't agents of the state, those Unitarian ministers couldn't be fined for conducting rites sanctioned by their church.’
    • ‘Government grants to Unitarian food shelves are just the beginning.’


Late 17th century: from modern Latin unitarius (from Latin unitas ‘unity’) + -an.