Rat definitions

răt
Any of numerous long-tailed rodents of various families (esp. Muridae and Cricetidae) resembling, but larger than, the mouse: rats are very destructive pests and carriers of highly contagious diseases, as bubonic plague and typhus.
noun
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1
A small pad formerly used in certain styles of women's coiffures to make the hair look thicker.
noun
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A pad of material, typically hair, worn as part of a woman's coiffure to puff out her own hair.
noun
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A sneaky, contemptible person.
  • An informer; stool pigeon.
  • A worker who is a scab.
  • A person who deserts or betrays a cause.
noun
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1
A person who frequently passes time at a particular place. Often used in combination.

A rink rat.

noun
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1
A person who spends a great deal of time at, in, or on a (specified) place.

A gym rat, a mall rat.

noun
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1
To hunt for or catch rats, especially with the aid of dogs.
verb
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1
To hunt for rats, esp. with dogs.
verb
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1
To reveal incriminating or embarrassing information about someone, especially to a person in authority.

Ratted on his best friend to the police.

verb
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1
To tease (the hair)
verb
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1
To work as a scab laborer.
verb
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To inform on or betray (someone)

His comrades will not rat him out.

verb
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1
To puff out (the hair) with or as if with a pad of material.
verb
48
1
The definition of a rat is a rodent with a lengthy tail, or is slang for a sneaky person.

An example of a rat is a roof rat.

An example of a rat is a person who plays mean tricks on his coworkers.

noun
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Any of various long-tailed rodents resembling mice but larger, especially one of the genus Rattus.
noun
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Rat is defined as to tease hair, or to hunt for rats, or is slang for betray.

An example of rat is to poof the front of the hair.

An example of rat is for a cat to hunt for rats.

An example of rat is to tattle on a friend.

verb
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Any of various animals similar to one of these long-tailed rodents.
noun
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(zoology) A medium-sized rodent belonging to the genus Rattus.
noun
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(informal) An informant or snitch.
noun
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(informal) A term indiscriminately applied to numerous members of several rodent families (e.g. voles and mice) having bodies longer than about 12 cm, or 5 inches.
noun
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(slang) A person who routinely spends time at a particular location.

Our teenager has become a mall rat.

He loved hockey and was a devoted rink rat.

noun
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(informal) A person who is known for betrayal; a scoundrel; a quisling.

What a rat, leaving us stranded here!

noun
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noun
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(1) (Radio Access Technology) See Multi RAT.
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(north-west London, slang) Vagina.

Get your rat out.

noun
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A wad of shed hair used as part of a hairstyle.
noun
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(usually with “on" or “out") To betray someone and tell their secret to an authority or an enemy; to turn someone in, bewray.

He ratted on his coworker.

He is going to rat us out!

verb
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(of a dog, etc.) To kill rats.
verb
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Origin of rat

From Middle English rat, rotte, from Old English ræt, from Proto-Germanic *rattaz, *ratō (compare West Frisian rôt, Dutch rat, dialectal German Ratz), from Proto-Indo-European *Hreh₃d- (“to scrape") (compare Welsh rhathu (“to grate, rasp"), Latin rōdō (“to gnaw"), rōstrum (“beak, prow"), Middle Persian randÄ«tan (“to scrape, smooth"), Sanskrit rádati (“he gnaws, cuts")).