KJV Dictionary Definition: brother
BROTHER, n. plu. brothers or brethren. L. frater.
1. A human male born of the same father and mother. A male by one of the parents only is called a half-brother, or brother of the half blood.
2. Any one closely united; an associate; as a band of brothers.
3. One that resembles another in manners.
He that is slothful in his work is brother to him that is a great waster. Proverbs 18.
In scripture, the term brother is applied to a kinsman by blood more remote that a son of the same parents; as in the case of Abraham and Lot, Jacob and Laban. Persons of the same profession call each other brother, as judges, clergymen, professors of religion, members of societies united in a common cause, monks and the like.
Kings give to each other the title of brother.address their congregations by the title of brethren. In a more general sense, brother or brethren is used for man in general; all men being children of the same primitive ancestors, and forming one race of beings.
Brother-german is a brother by the father's and mother's side, in contradistinction to a uterine brother, or by the mother only.