from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A brother by birth.
  • n. One of two individuals who vow mutual fidelity and trust by a ceremony involving the mingling of each other's blood.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A brother by birth.
  • n. Someone bound to another person in commitment and friendship by a ceremonial mingling of blood.

from the GNU version of the Collaborative International Dictionary of English

  • n. brother by blood or birth.
  • n. See under Blood.

from The Century Dictionary and Cyclopedia

  • n. A brother by birth.
  • n. One who has become a brother by the ceremony of mutual mingling of blood, as among the American Indians and others.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a male sworn (usually by a ceremony involving the mingling of blood) to treat another as his brother
  • n. a male with the same parents as someone else


Sorry, no etymologies found.


  • To him, still an unmarried cadet and working for more provident men when his contemporaries were all heads of families and solid men of property, the knowledge that he was blood brother to a senior scientist was quite the most important thing that had ever happened to him, even overshadowing his recent adventures, the meaning of which he was hardly qualified to understand anyway.

    Destiny Narrowly Avoided

  • Her first duty was to warn the blood brother that now he and El Gerente were friends and he must not tell El Gerente’s Pepita what an attractive interpreter he was obliged to employ.

    Tour de Force


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