Definition of deer :
1. A ruminant of the genus Cervus, of many species, and of related genera of the family Cervidae. The males, and in some species the females, have solid antlers, often much branched, which are shed annually. Their flesh, for which they are hunted, is called venison.
2. Any animal; especially, a wild animal.
pricket, roe, cervid, roebuck, Persian, wapiti, hog deer, hart, Barbary, moose deer, Pudu, Japanese deer, musk deer, Pampas, venison, swamp, muntjac, European elk, white-tailed, western moose, hind, African water deerlet, Virginia, axis, buck, blacktail, tufted, Philippine, spotted, fawn, fallow, red, Chinese water deer, sika
mammal (part of speech: noun)
gazelle, hog, camel, cavy, jackal, dromedary, lynx, hare, hedgehog, otter, antelope, wolf, sheep, elephant, rhinoceros, mule, lemming, donkey, horse, mongoose, squirrel, raccoon, hyena, dog, burro, ibex, wallaby, panda, coyote, elk, caribou, opossum, llama, lion, giraffe, mole, cow, puma, polecat, mouse, arctic fox, cat, ox, zebra, kangaroo, pig, weasel, marmot, gnu, hamster, porcupine, stag, camelopard, bobcat, ferret, panther, ocelot, dingo, chipmunk, bison, alpaca, gopher, cheetah, wombat, sable, yak, koala, rabbit, buffalo, swine, stoat, mink, shrew, skunk, cougar, fox, hippopotamus, possum, beaver, goat, bear, tiger, echidna, sloth, platypus, moose, chinchilla, jaguar, reindeer, rat, leopard, ermine, ass
mammals (part of speech: noun)
giraffes, dromedaries, platypuses, sloths, possums, rhinoceroses, squirrels, zebras, beavers, raccoons, asses, cougars, pigs, marmots, donkeys, dingoes, bears, wolves, jackals, camelopards, gnus, gophers, foxes, dogs, ibexes, mules, wombats, cats, tigers, wallabies, rabbits, mongooses, hares, hedgehogs, cows, llamas, cavies, minks, kangaroos, hyenas, bobcats, stoats, yaks, sables, hippopotami, cheetahs, elephants, chinchillas, weasels, pumas, polecats, otters, goats, porcupines, stags, panthers, coyotes, chipmunks, mice, ermines, opossums, rats, pandas, alpacas, lions, hamsters, leopards, horses, ocelots, gazelles, moles, oxen, shrews, lemmings, skunks, antelopes, lynxes, ferrets, koalas, jaguars, camels, reindeers, elks, echidnas, burros, buffaloes, arctic foxes, hogs