Collins English-English Dictionary

brother ['br^ðə]

1. 1. n a male person having the same parents as another person

2. 2. n short for half-brother

3. 3. n a male person belonging to the same group, profession, nationality, trade union, etc, as another or others; fellow member

4. 4. n (as modifier)

   brother workers

5. 5. n comrade; friend: used as a form of address

6. 6. n [Christianity] a member of a male religious order who undertakes work for the order without actually being in holy orders

7. 7. n a lay member of a male religious order

8. 8. interj [Slang] an exclamation of amazement, disgust, surprise, disappointment, etc

9. 9. interj [Etymology] Old English brothor; related to Old Norse brothir, Old High German bruoder, Latin frater, Greek phrater, Sanskrit bhratar