A man or boy considered in relation to another person or other people, as the child of the same parents; a male sibling. More generally: a man or…

a man or boy sharing at least one birth parent with another person; a brother by birth.

In singular = brother, n. (in various senses). In later use chiefly in religious or ceremonial titles.

Brother. (The corresponding feminine is tittie. Both are now considered rude.)

Caribbean and U.S. (chiefly southern and Midland) colloquial. A brother.

A brother. Also as a familiar form of address. Cf. bredren, n. 1.

regional. = brother, n. 1a. Frequently as an affectionate form of address.

A brother. Also used as an affectionate or familiar form of address to any man or boy. Cf. boet, n.

In speech and representations of speech: a brother. Also as a familiar form of address. Cf. bruv, n.

As a title preceding a man's name, esp. a forename: ‘Brother’. Cf. bra, n.1 2 bredda, n. 2 bro, n. 3a.

A person's male sibling; = brother, n. 1a.

A brother. Also prefixed to a man's first name as an informal title.