1. a male who has the same parents as another person
2. a male member of a religious community
3. a fellow member of an organization, especially a fraternity

Examples

• My older brother is studying medicine.
• She has two brothers and one sister.
• Brother Thomas leads the morning prayers.
• The fraternity brothers organized a charity event.
• He’s like a brother to me after all these years.
• The brothers in the monastery wake up at dawn.