Definitions from Wiktionary (Brother)

▸ noun:  Son of the same parents as another person.
▸ noun:  A male having at least one parent in common with another (see half-brother, stepbrother).
▸ noun:  A male fellow member of a religious community, church, trades union etc.
▸ noun:  (informal) A form of address to a man.
▸ noun:  (African-American Vernacular) A fellow black man.
▸ noun:  Somebody, usually male, connected by a common cause, situation, or affection.
▸ noun:  Someone who is a peer, whether male or female.
▸ noun:  (poetic) Someone who is a kinsman or shares the same patriarch.
▸ verb:  (transitive) To treat as a brother.
▸ noun:  Title of respect for an adult male member of a religious or fraternal order.
▸ noun:  Title of respect for an adult male member of a fraternal/sororal organization, or comrade in a movement, or even a stranger using fictive kin.
▸ noun:  A title used to personify or respectfully refer to concepts or animals.
▸ Also see brother

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