Rat1. (n.) One of several species of small rodents of the genus Mus and allied genera, larger than mice, that infest houses, stores, and ships, especially the Norway, or brown, rat (M. decumanus), the black rat (M. rattus), and the roof rat (M. Alexandrinus). These were introduced into America from the Old World.
2. (n.) A round and tapering mass of hair, or similar material, used by women to support the puffs and rolls of their natural hair.
3. (n.) One who deserts his party or associates; hence, in the trades, one who works for lower wages than those prescribed by a trades union.
4. (v. i.) In English politics, to desert one's party from interested motives; to forsake one's associates for one's own advantage; in the trades, to work for less wages, or on other conditions, than those established by a trades union.
5. (v. i.) To catch or kill rats.
Thesaurus Entries
Angora goat, Arctic fox, Belgian hare, Benedict Arnold, Brutus, Caffre cat, Indian buffalo, Judas, Judas Iscariot, Kodiak bear, Quisling, SOB, Virginia deer, aardvark, aardwolf, alpaca, anteater, antelope, antelope chipmunk, aoudad, apar, apostate, apostatize, archtraitor, armadillo, ass, aurochs, babble, badger, bandicoot, bassarisk, bastard, bat, be indiscreet, be unguarded, bear, bear witness against, beaver, betray, betray a confidence, betrayer, bettong, binturong, bison, blab, blabber, black bear, black buck, black cat, black fox, black sheep, blackleg, blow the whistle, blue fox, blurt, blurt out, bobcat, bolt, break away, brown bear, brush deer, brush wolf, buffalo, buffalo wolf, bugger, burro, burro deer, cachalot, camel, camelopard, capybara, carabao, caribou, carpincho, cat, cat-a-mountain, catamount, cattalo, cavy, chamois, cheetah, chevrotain, chignon, chinchilla, chipmunk, cinnamon bear, cockatrice, conniver, conspirator, conspirer, coon, coon cat, cotton mouse, cotton rat, cougar, cow, coyote, coypu, creep, cur, deer, deer tiger, defect, defector, desert, dingo, dog, donkey, dormouse, double agent, double-crosser, double-dealer, dromedary, echidna, eland, elephant, elk, ermine, eyra, fall, fallow deer, false hair, fart, ferret, field mouse, fink, fisher, fitch, flying phalanger, foumart, fox, fox squirrel, gazelle, gemsbok, genet, giraffe, give away, glutton, gnu, gnu goat, goat, goat antelope, gopher, grizzly bear, ground squirrel, groundhog, guanaco, guinea pig, hamster, hare, harnessed antelope, hartebeest, hedgehog, heel, hippopotamus, hog, hood, hooligan, horse, hyena, hyrax, ibex, inform, inform against, inform on, informer, intrigant, intriguer, jackal, jackass, jackrabbit, jaguar, jaguarundi, jerboa, jerboa kangaroo, jerk, kaama, kangaroo, kangaroo mouse, kangaroo rat, karakul, kinkajou, kit fox, koala, lapin, leak, lemming, leopard, leopard cat, let down, let drop, let fall, let slip, lion, llama, louse, lynx, machinator, mammoth, mara, marmot, marten, mastodon, meanie, meerkat, mink, mole, mongoose, moose, mother, mouflon, mountain goat, mountain lion, mountain sheep, mouse, mule, mule deer, muntjac, musk deer, musk hog, musk-ox, muskrat, musquash, narc, nark, nilgai, nutria, ocelot, okapi, onager, oont, opossum, otter, ounce, ox, pack rat, painter, panda, pangolin, panther, peach, peccary, peludo, phalanger, pig, pill, pine mouse, platypus, plotter, pocket gopher, pocket mouse, pocket rat, polar bear, polar fox