n.
Pronunciation: ' mas-t ə f
Function: noun
Etymology: Middle English mastif, from Medieval Latin mastivus, from Vulgar Latin *masuetivus, from Latin mansuetus tame ― more at MANSUETUDE
Date: 14th century
: any of a breed of very large massive powerful smooth-coated dogs that are apricot, fawn, or brindle and are often used as guard dogs
mastiff