- a person's brother by birth.
- a male person bound to another by ties of great friendship.
- something usually associated with or thought to exist inseparably from another thing, quality, circumstance, etc.: Humility is often the blood brother of patience.
- a male established in a close relationship with another male through the performance of a specific ritual, as the commingling of blood.
Origin of blood brother
Middle English word dating back to 1350–1400
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for blood brother
And how I've given you the love of a blood-brother to take the place of the brother who died?Riders of the Silences
What am I to do when a blood-brother is on the point of killing a cow?Indian Home Rule
M. K. Gandhi
Something—the blood-brother of death—had been here on this planet, that much was certain.Thompson's Cat
Robert Moore Williams
Though he were the King's blood-brother, he should tell for naught.The Ward of King Canute
Ottilie A. Liljencrantz
Herein he is as unaccountable as the gray wolf, who is his blood-brother.Life's Handicap
- a brother by birth
- a man or boy who has sworn to treat another as his brother, often in a ceremony in which their blood is mingled
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012