Definitions from Black's Law Dictionary: 2nd Edition and Ballentine's Law Dictionary as are available for each term in each dictionary.
  • Ballentine's Law Dictionary

    I do that you may do.

  • Black's Law Dictionary: 2nd Edition

    (Lat. I do that you may do.) A species of contract in tha civil law (being one of the innominate contracts) which occurs when I agree with a man to do his work for him if he will do mine for me; or if two persons agree to marry together or to do any other positive acts on both sides; or it may be to forbear on one side in consideration of something done on the other, 2 Bl. Comm. 444.