half-bred adjective 3noun 2forms 1 adjective3 •(offensive) half-breed (of mixed ethnicity) •not well-bred; imperfectly trained or ill-acquainted to good manners.He that is but Half a Philosopher, is in danger of being an Atheist; an Half-Physician is apt to turn Empiric; an Half-Bred man is conceited in his Address, and troublesome in his Conversation. — 1694 •(no longer used) Half-blooded. noun2 •A half-blooded animal.The Leicesters and half-breds are purchased by farmers who keep no breeding stock: they are well turniped during the winter, and clipped and fattened in the following season. — 1869 •A half-breed formshalf-breds