Definition of mastiff

Scrabble & Words with friends points


  • mastiff is a valid Scrabble US word with a point value of 15
  • mastiff is a valid Scrabble UK word with a point value of 15
  • mastiff is a valid Words with friends word with a point value of 16

Definition of mastiff


  • an old breed of powerful deep-chested smooth-coated dog used chiefly as a watchdog and guard dog (noun)

See definition of mastiff in Merriam Webster