mastiff

noun

mas·​tiff ˈma-stəf How to pronounce mastiff (audio)
: 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

Illustration of mastiff

Illustration of mastiff

Examples of mastiff in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Other dogs listed by the American Kennel Club as the best guardians include the Rottweiler, most shepherd dogs, the Staffordshire bull terrier, volpino Italiano, and Tibetan mastiff among others. Marco Rubio, Newsweek, 1 Nov. 2024 The Tibetan mastiff is often considered the most expensive dog since the breed has sold for up to millions of dollars. Olivia Munson, USA TODAY, 17 Aug. 2024 In 2011, another Tibetan mastiff puppy sold for $1.5 million, according to NBC News, which reported the animal was the most expensive dog sold at the time. Olivia Munson, USA TODAY, 17 Aug. 2024 The big, robust mastiff in Guercino’s portrait is posed on a stately balustrade next to a sturdy classical column. Christopher Knight, Los Angeles Times, 13 Aug. 2024 See all Example Sentences for mastiff 

Word History

Etymology

Middle English mastif, from Medieval Latin mastivus, from Vulgar Latin *masuetivus, from Latin mansuetus tame — more at mansuetude

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of mastiff was in the 14th century

Dictionary Entries Near mastiff

Cite this Entry

“Mastiff.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mastiff. Accessed 26 Nov. 2024.

Kids Definition

mastiff

noun
mas·​tiff ˈmas-təf How to pronounce mastiff (audio)
: any of a breed of large powerful smooth-coated dogs often used as watchdogs and guard dogs

More from Merriam-Webster on mastiff

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