(obsolete) Brotherhood; fraternity.

brotherhood

adelphopoiesis, a ceremony where males are unionised with one another.

The brother of one's spouse. / The husband of one's sibling. / The husband of the sibling of one's spouse. / The brother of the spouse of one's sibling.

Alternative spelling of half brother

A male sibling sharing a single parent, as distinguished from a full brother or brother-german, from a step-brother, or from a brother-like figure such as a blood brother.

A sibling's older brother used especially by children or by parents in speaking to their children. / (figurative) Something that is bigger in comparison. / Alternative form of Big Brother

younger brother (used especially by children, or by parents in speaking to their children)

Unwarranted, invasive, and discreet surveillance, especially of a people by its government / Any omnipresent figurehead representing oppressive control

plural of half-brother