an old breed of large powerful short-haired dog, usually fawn or brindle with a dark mask
Word origin
C14: from Old French, ultimately from Latin mansuētus tame; see mansuetude
mastiff in American English
(ˈmæstɪf)
noun
any of a breed of large, powerful dog with hanging lips and drooping ears and having a short, thick, often fawn-colored coat, dark on the muzzle, nose, and ears: formerly used for hunting, now often a watchdog and guard dog
: also called Old English mastiff
Word origin
ME mastif < OFr mastin < VL *mansuetinus < L mansuetus, tame; ME form infl. by OFr mestif, a mongrel < L mixtus, mixed: see mix