dog
Americannoun
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dogs
plural
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a domesticated canid, Canis familiaris, bred in many varieties.
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any carnivore of the dog family Canidae, having prominent canine teeth and, in the wild state, a long and slender muzzle, a deep-chested muscular body, a bushy tail, and large, erect ears.
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the male of such an animal.
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any of various animals resembling a canid.
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Informal. a fellow.
You've got a lovely family, you lucky dog.
Security was patting down the concertgoers, but that sly dog snuck a camera in.
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Slang. an ugly, despicable, boring, or crude person.
I had high hopes for this date, but he turned out to be a dog.
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Slang.
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something worthless or of extremely poor quality.
That used car you bought is a dog.
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an utter failure; flop.
Critics say his new play is a dog.
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Slang. hot dog.
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Astronomy. Dog, either of two constellations, Canis Major or Canis Minor.
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Slang. dogs, feet.
I couldn't wait to get home and take off my shoes—my dogs were killing me.
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Machinery.
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any of various mechanical devices, as for gripping or holding something.
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a projection on a moving part for moving steadily or for tripping another part with which it engages.
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Also called gripper, nipper. Metalworking. a device on a drawbench for drawing the work through the die.
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a clamp binding together two timbers.
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an iron bar driven into a stone or timber to provide a means of lifting it.
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a firedog; andiron.
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a word formerly used in communications to represent the letter D.
verb (used with object)
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dogs,
present (3rd person singular)
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dogged,
past participle, past
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dogging
present participle
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to follow or track like a dog, especially with hostile intent; hound.
After the film, the actor was dogged by paparazzi.
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to cause persistent problems or distress; haunt; plague.
She was dogged by a sense of guilt over her part in the scandal.
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to drive or chase with a dog or dogs.
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Machinery. to fasten with dogs.
They put the helmet on his head and dogged it to the gasket with the turnbuckles.
idioms
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throw (someone or something) to the wolves / dogs, wolf.
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let sleeping dogs lie, to refrain from action that would alter an existing situation for fear of causing greater problems or complexities.
I'm thinking of trying to repair the defect in my computer, but the issue is minor so maybe I should let sleeping dogs lie.
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put on the dog, to assume an attitude of wealth or importance; put on airs.
For banquet night we get to put on the dog and dress up and look spiffy.
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go to the dogs, to deteriorate; degenerate morally or physically.
This neighborhood is going to the dogs.
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call off the dogs, to pause or stop a relentless attack, pursuit, or campaign.
There was so much lobbying that the president had to ask the group to call off the dogs.
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fight like cats and dogs. fight.
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sick as a dog, very sick.
We went on vacation but I was sick as a dog the whole time and couldn't enjoy it.
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lead a dog's life, to have an unhappy or harassed existence.
He complains that he led a dog's life in the army.
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dog it,
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to shirk one's responsibility; loaf on the job.
He was a ball hog who couldn't run properly and dogged it on defense.
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to retreat, flee, renege, etc..
Her sponsor dogged it when she needed him most.
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noun
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a domesticated canine mammal, Canis familiaris, occurring in many breeds that show a great variety in size and form
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( as modifier )
dog biscuit
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any other carnivore of the family Canidae, such as the dingo and coyote
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( as modifier )
the dog family
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the male of animals of the dog family
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( as modifier )
a dog fox
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(modifier)
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spurious, inferior, or useless
dog Latin
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( in combination )
dogberry
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a mechanical device for gripping or holding, esp one of the axial slots by which gear wheels or shafts are engaged to transmit torque
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informal a fellow; chap
you lucky dog
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informal a man or boy regarded as unpleasant, contemptible, or wretched
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informal a male friend: used as a term of address
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slang an unattractive or boring girl or woman
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informal something unsatisfactory or inferior
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short for firedog
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any of various atmospheric phenomena See fogdog seadog sundog
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no chance at all
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informal something that is messy or bungled
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a wretched existence
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ruthless competition or self-interest
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informal dressed smartly or ostentatiously
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informal to behave or dress in an ostentatious or showy manner
verb
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to pursue or follow after like a dog
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to trouble; plague
to be dogged by ill health
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to chase with a dog or dogs
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to grip, hold, or secure by a mechanical device
adverb
Usage
Where does the word dog come from? How did man’s best friend fetch the name dog? This is actually one of English's toughest headscratchers. While dog is an extremely common word, its origin hounds us. Until around the 1500s, the go-to term for dog, was hund, which developed into hound. Fun fact: the Latin word for dog, canis, is the origin of the word canine and is, in fact, etymologically related to hound. But scholars can't quite put their paws on where the word dog came from. All we know is that it comes from the rare Old English word docga. But where did this word dog come from? Theories have been offered, but etymologists are left chasing their tails. As it happens, the Spanish word for dog, perro, is also of obscure origin. So, we guess we'll let this sleeping dog lie for now. Dog isn't alone: it finds lots of company in other English words that seem simple but whose origins are not. Discover more in our slideshow “‘Dog,’ ‘Boy,’ And Other Words That We Don’t Know Where They Came From."
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Participles
Conjugated Forms
Present
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dogsimple
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dogssimple
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have doggedperfect
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has doggedperfect
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am doggingprogressive
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are doggingprogressive
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is doggingprogressive
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have been doggingperfect progressive
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has been doggingperfect progressive
Past
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doggedsimple
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had doggedperfect
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was doggingprogressive
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were doggingprogressive
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had been doggingperfect progressive
Future
Etymology
Origin of dog
First recorded before 1050; from Middle English dogge, from Old English docga; further origin uncertain
Explanation
A dog is a member of the Canine genus, sometimes found wild but often found curled up on the couch when you're not at home. A dog is an animal of the genus Canis, probably descended from wolves, but in some cases more like teddy bears. Animal names are really old words, and dog is old enough that no one knows where it's from. We also call ugly ladies and rotten gentlemen "dogs," so be careful not to call someone "a dog" when you mean, "what up, dog." It's also a verb: to dog (or to hound) someone is to follow them around relentlessly.
Vocabulary lists containing dog
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Thought to be extinct until a Wyoming farm dog dragged a dead one home in 1981, every living ferret descends from just 18 wild survivors.
From The Wall Street Journal ● Nov. 4, 2026
"The moon is perfect, and yet I only found two little ones last night," Giuseppe Esposito, 69, told AFP as he searched with his dog Attila.
From Barron's ● Nov. 4, 2026
Unable to save his wife, and grievously injured from a battle with his former mentor, he became a running dog of a fascist empire that aimed to rule the entire galaxy.
From Salon ● Nov. 3, 2026
In everyday use, it has held keys and dog leashes.
From MarketWatch ● Nov. 3, 2026
He kept coming back again and again, and every time Marlene would run at him across the garden, trumpeting, tossing her ears, flapping them, but that only infuriated the dog even more.
From "An Elephant in the Garden" by Michael Morpurgo
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Noble said they remained on board for two-and-a-half hours while police and military personnel carried out checks, including searches with sniffer dogs.
From BBC ● Nov. 5, 2026
That raises the possibility of applications not only in human medicine but also in veterinary care, particularly for aging companion animals such as dogs and cats.
From Science Daily ● Nov. 4, 2026
All of the dogs were vaccinated on Monday, the agency added.
From Los Angeles Times ● Nov. 3, 2026
It is a shift for the top dogs in higher education, which have long associated prestige with high tuition.
From The Wall Street Journal ● Nov. 2, 2026
The dogs immediately swung down off the trail toward the lake, trying to get at the wolves and deer.
From "Woodsong" by Gary Paulsen
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Why play nice after he dogged her with ads using her estranged mother, claiming that Acton had lied about her childhood sexual abuse?
From Slate ● Nov. 4, 2026
Developers had hoped Cardiff Parkway would be operational by 2024, but the planning process was dogged by delays.
From BBC ● Oct. 29, 2026
That is stirring questions that have long dogged China’s official data: Are the numbers accurate?
From The Wall Street Journal ● Oct. 27, 2026
The country's third largest city has also become a symbol of the corruption that has dogged Albania's painful transition to capitalism, with Albanians paying with their health for recurring scandals.
From Barron's ● Oct. 8, 2026
“You tried to act all down and then you dogged my cousin.”
From "A Good Kind of Trouble" by Lisa Moore Ramée
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It took one look for people to start dogging the company out for its unreadability.
From Slate ● Aug. 21, 2026
The broader question of whether eye-watering AI spending will ever pay off is also dogging Meta.
From Barron's ● May 28, 2026
The bottom line is that the questions dogging the private-asset industry are bigger than just what is going to happen to business software.
From The Wall Street Journal ● Feb. 25, 2026
Another issue dogging the stock is whether Nvidia can maintain its huge technological advantage and defend its dominant market share.
From MarketWatch ● Jan. 29, 2026
As suddenly as it had attached itself, it quit dogging his heels and sat down, staring after him with eyes drowsily half-closed, contented and serene, maybe even purring.
From "The Milagro Beanfield War" by John Nichols
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