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brother (EN)
noun, interjection

noun “brother”

singular brother, plural brothers
  1. a male sibling; a boy or man who has the same parents as you
    I have an older brother who teaches at the university.
  2. a male fellow member of a religious community
    Brother Paul leads the choir every Sunday.
  3. (informal) used as a friendly form of address between men
    Hey brother, can you help me with this?
  4. (US, African-American Vernacular) a fellow black man
    He was happy to see another brother in the leadership position.

interjection “brother”

brother
  1. an expression of frustration or annoyance
    Oh brother! This traffic jam is never-ending!