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Longman Dictionary of Contemporary English
▪ A bloody-mouthed mastiff tied by a chain to a lintel of a door snarled and barked.
▪ A longtime breeder of champion bull mastiffs, Einstein is a smart, able, take-no-prisoners type of gal.
▪ Ask not what bull mastiffs can do for you.
▪ He stepped over, pierced one of the raw chunks with his dagger and held it up before the mastiff.
▪ Johno is a 13-stone bull mastiff, Barry's the tiny border terrier.
▪ One Sunday, he went hunting with his fierce black mastiffs, stopping only to swig at a flask of strong drink.
▪ The city's pet-loving Bohemians are obsessed by the horrible death of a woman mauled by a mastiff.
▪ Two huge gaolers, with the bodies of apes and the faces of cruel mastiffs, padded silently behind them.
The Collaborative International Dictionary

Dog \Dog\ (d[o^]g), n. [AS. docga; akin to D. dog mastiff, Dan. dogge, Sw. dogg.]

  1. (Zo["o]l.) A quadruped of the genus Canis, esp. the domestic dog ( Canis familiaris).

    Note: The dog is distinguished above all others of the inferior animals for intelligence, docility, and attachment to man. There are numerous carefully bred varieties, as the akita, beagle, bloodhound, bulldog, coachdog, collie, Danish dog, foxhound, greyhound, mastiff, pointer, poodle, St. Bernard, setter, spaniel, spitz dog, terrier, German shepherd, pit bull, Chihuahua, etc. There are also many mixed breeds, and partially domesticated varieties, as well as wild dogs, like the dingo and dhole. (See these names in the Vocabulary.)

  2. A mean, worthless fellow; a wretch.

    What is thy servant, which is but a dog, that he should do this great thing? -- 2 Kings viii. 13 (Rev. Ver. )

  3. A fellow; -- used humorously or contemptuously; as, a sly dog; a lazy dog. [Colloq.]

  4. (Astron.) One of the two constellations, Canis Major and Canis Minor, or the Greater Dog and the Lesser Dog. Canis Major contains the Dog Star (Sirius).

  5. An iron for holding wood in a fireplace; a firedog; an andiron.

  6. (Mech.)

    1. A grappling iron, with a claw or claws, for fastening into wood or other heavy articles, for the purpose of raising or moving them.

    2. An iron with fangs fastening a log in a saw pit, or on the carriage of a sawmill.

    3. A piece in machinery acting as a catch or clutch; especially, the carrier of a lathe, also, an adjustable stop to change motion, as in a machine tool.

  7. an ugly or crude person, especially an ugly woman. [slang]

  8. a hot dog. [slang]

    Note: Dog is used adjectively or in composition, commonly in the sense of relating to, or characteristic of, a dog. It is also used to denote a male; as, dog fox or g-fox, a male fox; dog otter or dog-otter, dog wolf, etc.; -- also to denote a thing of cheap or mean quality; as, dog Latin.

    A dead dog, a thing of no use or value.
    --1 Sam. xxiv. 14.

    A dog in the manger, an ugly-natured person who prevents others from enjoying what would be an advantage to them but is none to him.

    Dog ape (Zo["o]l.), a male ape.

    Dog cabbage, or Dog's cabbage (Bot.), a succulent herb, native to the Mediterranean region ( Thelygonum Cynocrambe).

    Dog cheap, very cheap. See under Cheap.

    Dog ear (Arch.), an acroterium. [Colloq.]

    Dog flea (Zo["o]l.), a species of flea ( Pulex canis) which infests dogs and cats, and is often troublesome to man. In America it is the common flea. See Flea, and Aphaniptera.

    Dog grass (Bot.), a grass ( Triticum caninum) of the same genus as wheat.

    Dog Latin, barbarous Latin; as, the dog Latin of pharmacy.

    Dog lichen (Bot.), a kind of lichen ( Peltigera canina) growing on earth, rocks, and tree trunks, -- a lobed expansion, dingy green above and whitish with fuscous veins beneath.

    Dog louse (Zo["o]l.), a louse that infests the dog, esp. H[ae]matopinus piliferus; another species is Trichodectes latus.

    Dog power, a machine operated by the weight of a dog traveling in a drum, or on an endless track, as for churning.

    Dog salmon (Zo["o]l.), a salmon of northwest America and northern Asia; -- the gorbuscha; -- called also holia, and hone.

    Dog shark. (Zo["o]l.) See Dogfish.

    Dog's meat, meat fit only for dogs; refuse; offal.

    Dog Star. See in the Vocabulary.

    Dog wheat (Bot.), Dog grass.

    Dog whelk (Zo["o]l.), any species of univalve shells of the family Nassid[ae], esp. the Nassa reticulata of England.

    To give to the dogs, or To throw to the dogs, to throw away as useless. ``Throw physic to the dogs; I'll none of it.''

    To go to the dogs, to go to ruin; to be ruined.

Douglas Harper's Etymology Dictionary

large, powerful breed of dog, early 14c., from Old French mastin "great cur, mastiff" (Modern French mâtin) or Provençal mastis, both from Vulgar Latin *mansuetinus "domesticated, tame," from Latin mansuetus "tame, gentle" (see mansuetude). Probably originally meaning a dog that stays in the house, thus a guard-dog or watchdog. Form in English perhaps influenced by Old French mestif "mongrel."


n. A large breed of dog. Often confused to be part of a type of large dogs. The Mastiff is a breed of its own that is sometimes referred to as an "English Mastiff". Other breeds have Mastiff in their informal name such as "French Mastiff" for Dogue de Bordeaux or include Mastiff in their breed names; Tibetan Mastiff or Neapolitan Mastiff. All are different breeds as well as the often confused Bullmastiff.


n. an old breed of powerful deep-chested smooth-coated dog used chiefly as a watchdog and guard dog


Mastiff means a large molosser dog. The term "the Mastiff group" or "the Mastiff" has been used synonymously with the term " molosser". For example, the bulldog breeds, the Great Dane, the mountain dogs, the pit bulls and even smaller dogs such as the Boston terrier, may be considered "Mastiff" in this broad sense.

Mastiff (company)

Mastiff is an American publisher of video games, with offices located in both Tokyo and San Francisco. The executive staff includes Bill Swartz, Mika Hayashi, Danny Hammett and Charles Van.

Mastiff (disambiguation)

A mastiff is one of a number of breeds of large dog, particularly

  • English Mastiff

It may also refer to:

  • Tadiran Mastiff, a battlefield unmanned aerial vehicle (UAV) built by Tadiran Electronic Industries
  • Mastiff (company), video game company
  • Mastiff, British Army designation for the Cougar armoured fighting vehicle, with extra armour, including cage armour
  • Mastiff (novel), a 2011 fantasy novel by Tamora Pierce
Mastiff (novel)

Mastiff is the third novel in Tamora Pierce's Provost's Dog trilogy, about a young Provost guard-woman in a fantasy kingdom called Tortall. The novel, as with all the Beka Cooper books, is written in first person diary form. The actual diary is said to be written in a mixture of Dog code and Beka's personal code

Usage examples of "mastiff".

He even showed the mastiff to the trooper, not that the man wanted to get too close.

Between Ozzie and the mastiff, Jess could pretend she was too busy to be embarrassed about that kiss.

The mastiff lay in front of the crate, his head on his paws, staring inside as if he could will the little female to come out and play.

With a backhand swing of his gun, The Shadow cuffed the second mastiff so forcibly that it lost its balance and wallowed like a puppy.

April had her eye out for a mastiff, she thought, that wore a chain leash.

She took the mugs into the kitchen and dumped them in the sink, reminding herself to tell him they had to do a lot more to find that mastiff walker.

April put the mastiff with the chain leash on the table to assign a dog-fancier detective to track his owner down.

She was pretty sure it was a mastiff, but there was more than one kind.

It resembled a giant mastiff with black-crusted fangs and a shimmering coat of maggots.

The barking behind me reached a new frenzy and then I knew the mastiff had been let loose, for the sound took on a new, more excited pitch.

The mastiff seemed to be panting in my left ear now and I realised he was very close.

The mastiff came racing back and I went racing on again, so he found himself running in the wrong direction once more.

The mastiff stopped too and we both faced each other across the grass, our shoulders and chests heaving with the effort.

The mastiff got a whiff of it and momentarily lost interest in me, then we both tore off down that smelly path.

We rolled over in a struggling heap, fox, chicken and dog, but parted immediately when the mastiff joined us.