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WordReference Random House Learner's Dictionary of American English © 2020
rat /ræt/USA pronunciation
n., interj., v., rat•ted, rat•ting. n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2020
- Mammalsa long-tailed animal, a rodent, that resembles a mouse but is larger.
- Slang Termsa scoundrel;
a disloyal or untrustworthy person.
- Slang Termsa person who abandons or betrays associates.
- Slang Termsrats, (used to show disgust or disappointment).
- Slang Termsto inform on or betray one's associates:[~ + on]She ratted on us when the cops caught her.
(rat),USA pronunciation n., interj., v., rat•ted, rat•ting. n.
- Mammalsany of several long-tailed rodents of the family Muridae, of the genus Rattus and related genera, distinguished from the mouse by being larger.
- Mammalsany of various similar or related animals.
- Slang Termsa scoundrel.
- Slang Terms
- a person who abandons or betrays his or her party or associates, esp. in a time of trouble.
- an informer.
- a scab laborer.
- Slang Termsa person who frequents a specified place:mall rat; gym rat.
- Clothinga pad with tapered ends formerly used in women's hair styles to give the appearance of greater thickness.
- smell a rat, to suspect or surmise treachery;
have suspicion:After noting several discrepancies in his client's story, the attorney began to smell a rat.
- Slang Termsrats, (an exclamation of disappointment, disgust, or disbelief.)
- Slang Terms
- to desert one's party or associates, esp. in a time of trouble.
- to turn informer;
squeal:He ratted on the gang, and the police arrested them.
- to work as a scab.
- to hunt or catch rats.
- Clothingto dress (the hair) with or as if with a rat.
- bef. 1000; Middle English rat(t)e, Old English ræt; cognate with Dutch rat, German Ratz, Ratte
Slang Termsa person who frequents a specified place:a mall rat; gym rats.
Collins Concise English Dictionary © HarperCollins Publishers::
rat /ræt/ n
vb (rats, ratting, ratted)
- any of numerous long-tailed murine rodents, esp of the genus Rattus, that are similar to but larger than mice and are now distributed all over the world
- informal a person who deserts his or her friends or associates, esp in time of trouble
- informal a worker who works during a strike; blackleg; scab
- informal a despicable person
- smell a rat ⇒ to detect something suspicious
Etymology: Old English rætt; related to Old Saxon ratta, Old High German rato
- (intransitive) usually followed by on: informal to divulge secret information (about); betray the trust (of)
- to default (on); abandon
- to hunt and kill rats