Main entry: brother, blood brother
Definition: a male with the same parents as someone else
Usage: my brother still lives with our parents
Main entry: Brother
Definition: (Roman Catholic Church) a title given to a monk and used as form of address
Usage: a Benedictine Brother
Main entry: brother
Definition: a male person who is a fellow member (of a fraternity or religion or other group)
Usage: none of his brothers would betray him
Definition: used as a term of address for those male persons engaged in the same movement
Usage: Greetings, comrade!
Main entry: brother, buddy, chum, crony, sidekick, pal
Definition: a close friend who accompanies his buddies in their activities