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Word of the Day Tuesday, June 9, 2026

mastiff

/mæstɪf/ noun · British & US
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What does mastiff mean?

noun

A large, powerful breed of dog, often used as a guard dog or companion animal. Mastiffs are known for their distinctive appearance and loyal nature.

Example

"The family's new mastiff, Max, was a gentle giant who loved to play fetch."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for mastiff

Antonyms of mastiff

Rhymes with mastiff

Etymologically related