1.  The male of deer, especially fallow deer and antelopes, or of goats, sheep, hares, and rabbits. [1913 Webster]
" A male fallow deer is called a fawn in his first year; a pricket in his second; a sorel in his third; a sore in his fourth; a buck of the first head in his fifth; and a great buck in his sixth. The female of the fallow deer is termed a doe. The male of the red deer is termed a stag or hart and not a buck, and the female is called a hind." Brande & C. [1913 Webster]

2.  A gay, dashing young fellow; a fop; a dandy. [1913 Webster]
"The leading bucks of the day." [1913 Webster]

3.  A male Indian or negro. [1913 Webster]
" The word buck is much used in composition for the names of antelopes; as, bush buck, spring buck." [1913 Webster]

1.  To copulate, as bucks and does. [1913 Webster]

2.  To spring with quick plunging leaps, descending with the fore legs rigid and the head held as low down as possible; -- said of a vicious horse or mule. [1913 Webster]

1.  To subject to a mode of punishment which consists in tying the wrists together, passing the arms over the bent knees, and putting a stick across the arms and in the angle formed by the knees. [1913 Webster]

2.  To throw by bucking. See Buck, v. i., 2. [1913 Webster]
"The brute that he was riding had nearly bucked him out of the saddle." [1913 Webster]

   A frame on which firewood is sawed; a sawhorse; a sawbuck. [1913 Webster]

   The beech tree. [1913 Webster]

buck, n. & v.
--n.
1 the male of various animals, esp. the deer, hare, or rabbit.
2 archaic a fashionable young man.
3 (attrib.) a sl. male (buck antelope). b US Mil. of the lowest rank (buck private).
--v.
1 intr. (of a horse) jump upwards with back arched and feet drawn together.
2 tr. a (usu. foll. by off) throw (a rider or burden) in this way. b US oppose, resist.
3 tr. & intr. (usu. foll. by up) colloq. a make or become more cheerful. b hurry.
4 tr. (as bucked adj.) colloq. encouraged, elated.

Idiom:
buck fever US nervousness when called on to act. buck-horn horn of buck as a material for knife-handles etc. buck-hound a small kind of staghound. buck rarebit Welsh rarebit with a poached egg on top. buck-tooth an upper tooth that projects.

Derivative:
bucker n.

buck, n. US etc. sl. a dollar.

Idiom:
a fast buck easy money.

buck, n. sl. an article placed as a reminder before a player whose turn it is to deal at poker.

Idiom:
pass the buck colloq. shift responsibility (to another).

buck, n.
1 US a saw-horse.
2 a vaulting-horse.

buck, n. the body of a cart.

buck, n. conversation; boastful talk.

Etymology:
Hindi buk buk

VB  be clean, render clean, clean, cleanse, mundify, rinse, wring, flush, full, wipe, mop, sponge, scour, swab, scrub, brush up, wash, lave, launder, buck, absterge, deterge, decrassify, clear, purify, depurate, despumate, defecate, purge, expurgate, elutriate, lixiviate, edulcorate, clarify, refine, rack, filter, filtrate, drain, strain, disinfect, fumigate, ventilate, deodorize, whitewash, castrate, emasculate, sift, winnow, pick, weed, comb, rake, brush, sweep, rout out, clear out, sweep out, make a clean sweep of.

N  fop, fine gentleman, swell, dandy, dandiprat, exquisite, coxcomb, beau, macaroni, blade, blood, buck, man about town, fast man, fribble, milliner, Jemmy Jessamy, carpet knight, masher, dude, fine lady, coquette, flirt, vamp.

N  leap, jump, hop, spring, bound, vault, saltation, ance, caper, curvet, caracole, gambade, gambado, capriole, demivolt, buck, buck jump, hop skip and jump, falcade, kangaroo, jerboa, chamois, goat, frog, grasshopper, flea, buckjumper, wallaby, leaping, saltatory, frisky, on the light fantastic toe, di salto in salto.

VB  leap, jump up, jump over the moon, hop, spring, bound, vault, ramp, cut capers, trip, skip, dance, caper, buck, buck jump, curvet, caracole, foot it, bob, bounce, flounce, start, frisk, jump about, trip it on the light fantastic toe, trip the light fantastic, dance oneself off one's legs, dance off one's shoes.

N  animal, animal kingdom, fauna, brute creation, beast, brute, creature, critter, wight, created being, creeping thing, living thing, dumb animal, dumb creature, zoophyte, mammal, bird, reptile, amphibian, fish, crustacean, shellfish, mollusk, worm, insect, arthropod, microbe, microbe, animalcule, alligator, crocodile, saurian, dinosaur (extinct), snake, serpent, viper, eft, asp, aspick, frog, toad, trout, bass, tuna, muskelunge, sailfish, sardine, mackerel, ant, mosquito, bee, honeybee, tardigrade, spider, biped, quadruped, webfoot, flocks and herds, live stock, domestic animals, wild animals, game, ferae naturae, beasts of the field, fowls of the air, denizens of the sea, black game, black grouse, blackcock, duck, grouse, plover, rail, snipe, horse, cattle, kine, ox, bull, bullock, cow, milch cow, calf, heifer, shorthorn, sheep, lamb, lambkin, ewe, ram, tup, pig, swine, boar, hog, sow, steer, stot, tag, teg, bison, buffalo, yak, zebu, dog, cat, dog, hound, pup, puppy, whelp, cur, mongrel, house dog, watch dog, sheep dog, shepherd's dog, sporting dog, fancy dog, lap dog, toy dog, bull dog, badger dog, mastiff, blood hound, grey hound, stag hound, deer hound, fox hound, otter hound, harrier, beagle, spaniel, pointer, setter, retriever, Newfoundland, water dog, water spaniel, pug, poodle, turnspit, terrier, fox terrier, Skye terrier, Dandie Dinmont, collie, feline, puss, pussy, grimalkin, gib cat, tom cat, fox, Reynard, vixen, stag, deer, hart, buck, doe, roe, caribou, coyote, elk, moose, musk ox, sambar, bird, poultry, fowl, cock, hen, chicken, chanticleer, partlet, rooster, dunghill cock, barn door fowl, feathered tribes, feathered songster, singing bird, dicky bird, canary, warbler, finch, aberdevine, cushat, cygnet, ringdove, siskin, swan, wood pigeon, vermin, varmint, pest, animal, zoological equine, bovine, vaccine, canine, feline, fishy, piscatory, piscatorial, molluscous, vermicular, gallinaceous, rasorial, solidungulate, soliped.

N  man, male, he, him, manhood, gentleman, sir, master, sahib, yeoman, wight, swain, fellow, blade, beau, elf, chap, gaffer, good man, husband, Mr, mister, boy, cock, drake, gander, dog, boar, stag, hart, buck, horse, entire horse, stallion, gibcat, tomcat, he goat, Billy goat, ram, tup, bull, bullock, capon, ox, gelding, steer, stot, androgen, homosexual, gay, queen, male, he-, masculine, manly, virile, unwomanly, unfeminine, Pron, he, him, his, hominem pagina nostra sapit, homo homini aut deus aut lupus, homo vitae commodatus non donatus est.

N  blackness darkness, (want of light), swartliness, lividity, dark color, tone, color, chiaroscuro, nigrification, infuscation, jet, ink, ebony, coal pitch, soot, charcoal, sloe, smut, raven, crow, negro, blackamoor, man of color, nigger, darkie, Ethiop, black, buck, nigger, coon, sambo, lampblack, ivory black, blueblack, writing ink, printing ink, printer's ink, Indian ink, India ink, in mourning.

black buck, buck bean, buck fever, buck private, buck sergeant, buck up, fast buck, lee buck trevino, pass the buck, pearl buck, pearl sydenstricker buck, quick buck, water buck, young buck