WordReference Random House Learner's Dictionary of American English © 2026
cat1 /kæt/USA pronunciation   n. [countable]
  1. Mammalsa small, furry, carnivorous animal often kept as a pet:Our cats like to play with string.
  2. Mammalsa grouping of similar animals, as the lion, tiger, leopard, or jaguar, and including numerous small wild cats:The cats were kept next to the bears at the zoo.
  3. Slang TermsSlang.
    • a person, esp. a man:a cool cat.
Idioms
  1. Idioms let the cat out of the bag, to reveal, tell, or make known a secret.


cat.,  an abbreviation of:
  1. catalog;
    catalogue.

WordReference Random House Learner's Dictionary of American English © 2026
rain /reɪn/USA pronunciation   n. 
  1. Meteorology[uncountable] water that is condensed from the vapor in the atmosphere and falls to earth in drops.
  2. Meteorologya rainfall, rainstorm, or shower: [countable]a heavy rain.[uncountable]a fifty percent chance of rain.
  3. Meteorology rains, [plural;
    usually: the + ~]
    a rainy season;
    seasonal rainfall.
  4. a heavy and continuous fall of something usually unwelcome:[countable* usually singular]a rain of blows.

v. 
  1. (of rain) to fall:[no object;it + ~]It rained all night.
  2. to (cause to) come down like rain: [no object]Bombs rained from above. Tears rained from their eyes.[+ object]The jets rained bombs down on the enemy position.
  3. to offer or give in great quantity;
    shower:[+ object]to rain favors upon a person.
  4. rain out, [+ object;
    usually: be + ~-ed]
    to cancel or postpone because of rain:The last game was rained out.
Idioms
  1. Idioms rain cats and dogs, to rain heavily.


WordReference Random House Unabridged Dictionary of American English © 2026
cat1  (kat),USA pronunciation n., v., cat•ted, cat•ting. 
n. 
  1. Mammalsa small domesticated carnivore, Felis domestica or F. catus, bred in a number of varieties.
  2. any of several carnivores of the family Felidae, as the lion, tiger, leopard or jaguar, etc.
  3. Slang Terms
    • a person, esp. a man.
    • a devotee of jazz.
  4. Sex and Gendera woman given to spiteful or malicious gossip.
  5. Textilesthe fur of the domestic cat.
  6. a cat-o'-nine-tails.
  7. Games
    • British Terms[Chiefly Brit.]the tapering piece of wood used in the game of tipcat.
    • British Terms[Chiefly Brit.]the game itself.
    • See four old cat, one old cat, three old cat, two old cat. 
  8. Nautical, Naval Termsa catboat.
  9. Nautical, Naval Termsa catamaran.
  10. Fisha catfish.
  11. Nautical, Naval Termsa tackle used in hoisting an anchor to the cathead.
  12. a double tripod having six legs but resting on only three no matter how it is set down, usually used before or over a fire.
  13. Nautical, Naval Terms, Informal Terms[Navy Informal.]catapult (def. 2).
  14. Military(in medieval warfare) a movable shelter for providing protection when approaching a fortification.
  15. Idioms bell the cat, to attempt something formidable or dangerous.
  16. Idioms let the cat out of the bag, to divulge a secret, esp. inadvertently or carelessly:He let the cat out of the bag, and the surprise party wasn't a surprise after all.

v.t. 
  1. to flog with a cat-o'-nine-tails.
  2. Nautical, Naval Termsto hoist (an anchor) and secure to a cathead.

v.i. 
  1. British Termsto vomit.
  2. Slang Terms cat around:
    • to spend one's time aimlessly or idly.
    • to seek sexual activity indiscriminately;
      tomcat.
  • Gmc), Late Latin cattus, catta (first attested in the 4th century, presumably with the introduction of domestic cats); ultimately origin, originally obscure
  • bef. 900; Middle English cat, catte, Old English catt (masculine), catte (feminine); cognate with Old Frisian, Middle Dutch katte, Old High German kazza, Old Norse kǫttr, Irish cat, Welsh cath (Slavic *kotù, Lithuanian katė̃ perh.

Cat1  (kat)USA pronunciation,
  1. [Trademark.]a Caterpillar tractor.

CAT, 
    1. Meteorologyclear-air turbulence.
    2. Medicinecomputerized axial tomography. Cf. CAT scanner.

cat., 
    1. catalog;
      catalogue.
    2. catechism.

WordReference Random House Unabridged Dictionary of American English © 2026
rain  (rān),USA pronunciation n. 
  1. Meteorologywater that is condensed from the aqueous vapor in the atmosphere and falls to earth in drops more than 150 in. (0.5 mm) in diameter. Cf. drizzle (def. 6).
  2. Meteorologya rainfall, rainstorm, or shower:We had a light rain this afternoon.
  3. Meteorology rains, the rainy season;
    seasonal rainfall, as in India.
  4. Meteorologyweather marked by steady or frequent rainfall:We had rain most of last summer.
  5. a heavy and continuous descent or inflicting of anything:a rain of blows; a rain of vituperation.

v.i. 
  1. (of rain) to fall (usually used impersonally with it as subject):It rained all night.
  2. to fall like rain:Tears rained from their eyes.
  3. to send down rain:The lightning flashed and the sky rained on us in torrents.

v.t. 
  1. to send down in great quantities, as small pieces or objects:People on rooftops rained confetti on the parade.
  2. to offer, bestow, or give in great quantity:to rain favors upon a person.
  3. to deal, hurl, fire, etc., repeatedly:to rain blows on someone's head.
  4. rain cats and dogs, [Informal.]to rain very heavily or steadily:We canceled our picnic because it rained cats and dogs.
  5. rain out, to cause, by raining, the cancellation or postponement of a sports event, performance, or the like:The double-header was rained out yesterday.
  • bef. 900; (noun, nominal) Middle English rein; Old English regn, rēn, cognate with Dutch, German regen, Old Norse regn, Gothic rign; (verb, verbal) Middle English reinen, Old English regnian
rainless, adj. 
rainless•ness, n. 
    10. lavish, shower, pour.

Collins Concise English Dictionary © HarperCollins Publishers::
cat /kæt/ n
  1. Also called: domestic cat a small domesticated feline mammal, Felis catus (or domesticus), having thick soft fur and occurring in many breeds in which the colour of the fur varies greatly: kept as a pet or to catch rats and mice
  2. Also called: big cat any of the larger felines, such as a lion or tiger
  3. any wild feline mammal of the genus Felis, such as the lynx or serval, resembling the domestic cat
    Related adjective(s): feline
  4. old-fashioned derogatory someone who gossips maliciously
  5. slang a man; guy
  6. a heavy tackle for hoisting an anchor to the cathead
  7. a short sharp-ended piece of wood used in the game of tipcat
  8. short for catboat
  9. short for cat-o'-nine-tails
  10. a bag of catsIrish informal a bad-tempered person: she's a real bag of cats this morning
  11. fight like Kilkenny catsto fight until both parties are destroyed
  12. let the cat out of the bagto disclose a secret, often by mistake
  13. like a cat on a hot tin roof, like a cat on hot bricksin an uneasy or agitated state
  14. like cat and dogquarrelling savagely
  15. look like something the cat brought into appear dishevelled or bedraggled
  16. not a cat in hell's chanceno chance at all
  17. not have room to swing a catto have very little space
  18. play cat and mouseto play with a person or animal in a cruel or teasing way, esp before a final act of cruelty or unkindness
  19. put the cat among the pigeonsto introduce some violently disturbing new element
  20. rain cats and dogsto rain very heavily
vb (cats, catting, catted)
  1. (transitive) to flog with a cat-o'-nine-tails
  2. (transitive) to hoist (an anchor) to the cathead
  3. (intransitive) a slang word for vomit
Etymology: Old English catte, from Latin cattus; related to Old Norse köttr, Old High German kazza, Old French chat, Russian kotˈcatˌlike adj ˈcattish adj
cat /kæt/ n
  1. informal short for catamaran
cat /kæt/ n
  1. short for catalytic converter
  2. (as modifier): a cat car
adj
  1. short for catalytic: a cat cracker
'rain cats and dogs' also found in these entries (note: many are not synonyms or translations):
cat - rain

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