mas‧tiff /ˈmæstəf, ˈmæstɪf/ (
also bull mastiff)
noun [countable][
Date: 1300-1400;
Language: Old French;
Origin: mastin, from Latin mansuetus 'easy to handle, not wild']
a large strong dog, often used to guard houses
[TahlilGaran] Dictionary of Contemporary English ▲