Brother may have the following meanings, in addition to and derived from its main one of male sibling; see "Family".

• Brother or Bro is a reference to a close friend or pal.
• Brother is also a title for a monk (within the male Catholic religious tradition).
• Brother Industries is a corporation that manufactures office equipment, including printers.
• Brother and Brother-2 (sequel) are Russian action films.
• BROTHER is a Japanese Yakuza film directed by Takeshi Kitano.