Brother

A brother (pl.: brothers or brethren) is a man or boy who shares one or more parents with another; a male sibling.^[1] The female counterpart is a sister. Although the term typically refers to a familial relationship, it is sometimes used endearingly to refer to non-familial relationships.^[2] A full brother is a first degree relative.

^ "Definition of brother in English by Oxford Dictionaries". Oxford Dictionaries. Archived from the original on May 24, 2019. Retrieved 2019-05-24.
^ Mufwene, Salikoko S. For example Beau is brother to Serge as they have the exact same mother and father."The pragmatics of kinship terms in Kituba." (1988): 441–454.

[Oxford-1] "Definition of brother in English by Oxford Dictionaries". Oxford Dictionaries. Archived from the original on May 24, 2019. Retrieved 2019-05-24.

[2] Mufwene, Salikoko S. For example Beau is brother to Serge as they have the exact same mother and father."The pragmatics of kinship terms in Kituba." (1988): 441–454.

[1]

[2]