Dictionary.net

One of the followers of Socinus; a believer in Socinianism.

Pertaining to Socinus, who in the 16th century denied the doctrine of the Trinity, the deity of Christ, etc.

n. One of the followers of Socinus, who denied the doctrines of the Trinity, the deity of Christ, the native and total depravity of man, the vicarious atonement, and the eternity of future punishment.