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rat
9 ENTRIES FOUND:
plural rats
plural rats
Learner's definition of RAT
[count]
1
: a small animal that has a pointed nose and a long, thin tail大老鼠；耗子 — see picture at rodent
- a dirty old building infested by rats and mice大小老鼠为患的肮脏的旧楼
- a lab/laboratory rat [=a rat that is used by scientists for experiments]供实验用的老鼠
- He came in from the rain looking like a drowned rat. [=looking very wet and miserable]他从雨中进屋，淋得像只落水老鼠。
2
informal
a : a person who is not loyal or who cannot be trusted卑鄙小人；鼠辈
- I can't believe that rat turned us in to the police!我真不敢相信那个小人竟会向警方告发我们！
b : a person who is bad or cruel坏人；残忍的人
- No one understands why she's with a rat like him.谁都不能理解她为什么和他这样的坏蛋在一起。
3
US, informal : a person who spends a lot of time in a specified place常待在某处的人；常客
- a mall rat经常逛商场的人
- Every night he goes to work out with the other gym rats.他每天晚上都去和其他健身爱好者一起锻炼。
smell a rat
informal
: to think or suspect that something is wrong about a situation怀疑出了问题；感到情况不对劲
- She smelled a rat when her husband came home with lipstick on his collar.她见到丈夫回家时衣领上竟有口红印儿，怀疑有问题。
2 rat /ˈræt/ verb
rats; ratted; ratting
2 rat
/ˈræt/
verb
rats; ratted; ratting
Learner's definition of RAT
informal
: to tell someone in authority (such as the police) about something wrong that someone has done : to betray someone告密；出卖；背叛 — often + on
[no object]
- The teacher knows what we did, which means that somebody ratted.老师知道了我们干的事，说明有人告密了。
- I am trying to find out who ratted on me.我正在设法想方设法找出是谁出卖了我。
[+ object]
(US) — + out - Someone ratted him out to the police.有人向警方告发了他。
- They accused him of ratting out his own brother.他们指责他出卖了自己的兄弟。
1
a
: any of numerous rodents (Rattus and related genera) differing from the related mice especially by considerably larger size
b
: any of various similar rodents
ratted; ratting
Synonyms
Example Sentences
Noun a dirty old building infested by rats and mice I can't believe that rat turned us in to the police! No one understands why she's with a rat like him. Every night he goes to work out with the other gym rats. Verb The teacher knows what we did, which means that somebody ratted.
Recent Examples on the Web
Dana Hedgpeth, Washington Post, 8 Sep. 2022 Igartua had gotten several speed camera tickets, Greenberg said, and his letter asked the mayor to put the money from speeding tickets to good use, including to alleviate the rat problem in the alley behind Igartua’s house. Stephanie Casanova, Chicago Tribune, 7 Sep. 2022 Complaints mention drafty windows, a problem with a smoke detector, mold, appliances that don’t function and rat feces. Hartford Courant, 6 Sep. 2022 The same tests were run on rat models with the disease as well as patients suffering from other neurodegenerative and inflammatory diseases. William A. Haseltine, Forbes, 17 Aug. 2022 The yoga aficionado and dedicated gym rat modeled samples from her eponymous clothing line for H&M in the streets of London. Cara Lynn Shultz, Peoplemag, 16 Aug. 2022 During the pandemic, rat sightings have also gone up (or at least more New Yorkers have complained about them). BostonGlobe.com, 6 Aug. 2022 The two team up to fulfill both their dreams, in turn, making the restaurant a success, while figuring out how to navigate the harsh Parisian food critic and rat-loathing head chef that threaten to derail their successes. Nitya Rao, Seventeen, 20 July 2022 This led to a deeper investigation that found rat activity on the first and second floors of the facility. Jodicee Arianna, The Arizona Republic, 11 Aug. 2022 See More
Noun
But even one rat was too much for some staffers there. Dana Hedgpeth, Washington Post, 8 Sep. 2022 Igartua had gotten several speed camera tickets, Greenberg said, and his letter asked the mayor to put the money from speeding tickets to good use, including to alleviate the rat problem in the alley behind Igartua’s house. Stephanie Casanova, Chicago Tribune, 7 Sep. 2022 Complaints mention drafty windows, a problem with a smoke detector, mold, appliances that don’t function and rat feces. Hartford Courant, 6 Sep. 2022 The same tests were run on rat models with the disease as well as patients suffering from other neurodegenerative and inflammatory diseases. William A. Haseltine, Forbes, 17 Aug. 2022 The yoga aficionado and dedicated gym rat modeled samples from her eponymous clothing line for H&M in the streets of London. Cara Lynn Shultz, Peoplemag, 16 Aug. 2022 During the pandemic, rat sightings have also gone up (or at least more New Yorkers have complained about them). BostonGlobe.com, 6 Aug. 2022 The two team up to fulfill both their dreams, in turn, making the restaurant a success, while figuring out how to navigate the harsh Parisian food critic and rat-loathing head chef that threaten to derail their successes. Nitya Rao, Seventeen, 20 July 2022 This led to a deeper investigation that found rat activity on the first and second floors of the facility. Jodicee Arianna, The Arizona Republic, 11 Aug. 2022 See More Word History
Etymology
Noun
Middle English rat, ratte, going back to Old English ræt (attested once), akin to Old Saxon ratta "rat," Middle Dutch ratte, rotte, Old High German ratta, radda, ratza (feminine weak nouns), also Old High German rato (masculine weak noun), probably going back to an ablauting paradigm *raþō (nominative), *rattaz/*ruttaz (genitive), *radeni/*rudeni (dative), going back to earlier *(H)rót-ōn, *(H)rt-n-ós, *(H)rt-én-i, of uncertain origin
Note: The origin of the etymon beyond Germanic is obscure. Regionally in German Ratz or Ratze are applied to other animals (as the dormouse and the polecat); if these senses are old, the application of the etymon to rats (Rattus rattus, Rattus norvegicus) may be secondary. Note that if the base is pre-Germanic *rat-, there is no connection to either Latin rōdere "gnaw, nibble, eat away" (see rodent) or rādere "scrape, shave" (see rase), as has often been assumed.
First Known Use
Noun
before the 12th century, in the meaning defined at sense 1a
Verb
1812, in the meaning defined at intransitive sense 1
Time Traveler
The first known use of rat was before the 12th century Phrases Containing rat
noun
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