blood brother
noun
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
OTHER WORDS FROM blood brother
blood brotherhood, nounWords nearby blood brother
Example sentences from the Web for blood brother
British Dictionary definitions for blood brother
blood brother
noun
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