1.  Properly, the leaf, or flat part of the leaf, of any plant, especially of gramineous plants. The term is sometimes applied to the spire of grasses. [1913 Webster]
"The crimson dulse . . . with its waving blade." [1913 Webster]
"First the blade, then ear, after that the full corn in the ear." [1913 Webster]

2.  The cutting part of an instrument; as, the blade of a knife or a sword. [1913 Webster]

3.  The broad part of an oar; also, one of the projecting arms of a screw propeller. [1913 Webster]

4.  The scapula or shoulder blade. [1913 Webster]

5.  The principal rafters of a roof. Weale. [1913 Webster]

6.  The four large shell plates on the sides, and the five large ones of the middle, of the carapace of the sea turtle, which yield the best tortoise shell. De Colange. [1913 Webster]

7.  A sharp-witted, dashing, wild, or reckless, fellow; -- a word of somewhat indefinite meaning. [1913 Webster]
"He saw a turnkey in a trice
Fetter a troublesome blade." [1913 Webster]

8.  The flat part of the tongue immediately behind the tip, or point. [1913 Webster]
"“Lower blade” implies, of course, the lower instead of the upper surface of the tongue." [Webster 1913 Suppl.]

   To furnish with a blade. [1913 Webster]

   To put forth or have a blade. [1913 Webster]
"As sweet a plant, as fair a flower, is faded
As ever in the Muses' garden bladed." [1913 Webster]

blade, n.
1 a the flat part of a knife, chisel, etc., that forms the cutting edge. b = razor-blade.
2 the flattened functional part of an oar, spade, propeller, bat, skate, etc.
3 a the flat, narrow, usu. pointed leaf of grass and cereals. b the whole of such plants before the ear is formed (in the blade). c Bot. the broad thin part of a leaf apart from the petiole.
4 (in full blade-bone) a flat bone, e.g. in the shoulder.
5 Archaeol. a long narrow flake (see FLAKE(1) 3).
6 poet. a sword.
7 colloq. (usu. archaic) a carefree young fellow.

Derivative:
bladed adj. (also in comb.).

Etymology:
OE bl{aelig}d f. Gmc

N  instrument, machinery, mechanism, engineering, instrument, organ, tool, implement, utensil, machine, engine, lathe, gin, mill, air engine, caloric engine, heat engine, gear, tackle, tackling, rig, rigging, apparatus, appliances, plant, materiel, harness, trappings, fittings, accouterments, barde, equipment, equipmentage, appointments, furniture, upholstery, chattels, paraphernalia, mechanical powers, lever, leverage, mechanical advantage, crow, crowbar, handspike, gavelock, jemmy, jimmy, arm, limb, wing, oar, paddle, pulley, wheel and axle, wheelwork, clockwork, wheels within wheels, pinion, crank, winch, cam, pedal, capstan, wheel, inclined plane, wedge, screw, spring, mainspring, can hook, glut, heald, heddle, jenny, parbuckle, sprag, water wheel, handle, hilt, haft, shaft, heft, shank, blade, trigger, tiller, helm, treadle, key, turnscrew, screwdriver, knocker, hammer, edge tool, borer, vice, teeth, nail, rope, peg, support, spoon, arms, oar, cardiograph, recapper, snowplow, tenpenny, votograph, instrumental, mechanical, machinal, brachial.

N  arm, arms, weapon, deadly weapon, armament, armaments, armature, panoply, stand of arms, armor, armory, apparatus belli, ammunition, powder, powder and shot, cartridge, ball cartridge, cartouche, fireball, villainous saltpeter, dumdum bullet, explosive, gunpowder, guncotton, mercury fulminate, picrates, pentaerythritol tetranitrate, PETN, high explosive, trinitrotoluene, TNT, dynamite, melinite, cordite, lyddite, plastic explosive, plastique, pyroxyline, sword, saber, broadsword, cutlass, falchion, scimitar, cimeter, brand, whinyard, bilbo, glaive, glave, rapier, skean, Toledo, Ferrara, tuck, claymore, adaga, baselard, Lochaber ax, skean dhu, creese, kris, dagger, dirk, banger, poniard, stiletto, stylet, dudgeon, bayonet, sword-bayonet, sword-stick, side arms, foil, blade, steel, ax, bill, pole-ax, battle-ax, gisarme, halberd, partisan, tomahawk, bowie knife, ataghan, attaghan, yataghan, yatacban, assagai, assegai, good sword, trusty sword, naked sword, cold steel, club, mace, truncheon, staff, bludgeon, cudgel, life preserver, shillelah, sprig, hand staff, quarter staff, bat, cane, stick, knuckle duster, billy, blackjack, sandbag, waddy, gun, piece, firearms, artillery, ordnance, siege train, battering train, park, battery, cannon, gun of position, heavy gun, field piece, mortar, howitzer, carronade, culverin, basilisk, falconet, jingal, swivel, pederero, bouche a feu, petard, torpedo, mitrailleur, mitrailleuse, infernal machine, smooth bore, rifled cannon, Armstrong gun, Lancaster gun, Paixhan gun, Whitworth gun, Parrott gun, Krupp gun, Gatling gun, Maxim gun, machine gun, pompom, ten pounder, small arms, musket, musketry, firelock, fowling piece, rifle, fusil, caliver, carbine, blunderbuss, musketoon, Brown Bess, matchlock, harquebuss, arquebus, haguebut, pistol, postolet, petronel, small bore, breach-loader, muzzle-loader, revolver, repeater, Minis rifle, Enfield rifle, Flobert rifle, Westley Richards rifle, Snider rifle, Martini-Henry rifle, Lee-Metford rifle, Lee-Enfield rifle, Mauser rifle, magazine rifle, needle gun, chassepot, wind gun, air gun, automatic gun, automatic pistol, escopet, escopette, gunflint, gun- lock, hackbut, shooter, shooting iron, six-shooter, shotgun, Uzzi, assault rifle, Kalashnikov, bow, crossbow, balister, catapult, sling, battering ram, gunnery, ballistics, missile, bolt, projectile, shot, ball, grape, grape shot, canister shot, bar shot, cannon shot, langrel shot, langrage shot, round shot, chain shot, balista, ballista, slung shot, trebucbet, trebucket, bullet, slug, stone, brickbat, grenade, shell, bomb, carcass, rocket, congreve, congreve rocket, shrapnel, mitraille, levin bolt, levin brand, thunderbolt, pike, lance, spear, spontoon, javelin, dart, jereed, jerid, arrow, reed, shaft, bolt, boomerang, harpoon, gaff, eelspear, oxgoad, weet-weet, wommerah, cattle prod, chemical mace, en flute, nervos belli pecuniam infinitam.

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  sharpness, acuity, acumination, spinosity, point, spike, spine, spicule, spiculum, needle, hypodermic needle, tack, nail, pin, prick, prickle, spur, rowel, barb, spit, cusp, horn, antler, snag, tag thorn, bristle, Adam's needle, bear grass, tine, yucca, nib, tooth, tusk, spoke, cog, ratchet, crag, crest, arete, cone peak, sugar loaf, pike, aiguille, spire, pyramid, steeple, beard, chevaux de frise, porcupine, hedgehog, brier, bramble, thistle, comb, awn, beggar's lice, bur, burr, catchweed, cleavers, clivers, goose, grass, hairif, hariff, flax comb, hackle, hatchel, heckle, wedge, knife edge, cutting edge, blade, edge tool, cutlery, knife, penknife, whittle, razor, razor blade, safety razor, straight razor, electric razor, scalpel, bistoury, lancet, plowshare, coulter, colter, hatchet, ax, pickax, mattock, pick, adze, gill, billhook, cleaver, cutter, scythe, sickle, scissors, shears, pruning shears, cutters, wire cutters, nail clipper, paper cutter, sword, bodkin, belduque, bowie knife, paring knife, bushwhacker, drawing knife, drawing shave, microtome, chisel, screwdriver blade, flint blade, guillotine, sharpener, hone, strop, grindstone, whetstone, novaculite, steel, emery, sharp, keen, acute, acicular, aciform, aculeated, acuminated, pointed, tapering, conical, pyramidal, mucronate, mucronated, spindle shaped, needle shaped, spiked, spiky, ensiform, peaked, salient, cusped, cuspidate, cuspidated, cornute, cornuted, cornicultate, prickly, spiny, spinous, spicular, thorny, bristling, muricated, pectinated, studded, thistly, briary, craggy, snaggy, digitated, two-edged, fusiform, dentiform, denticulated, toothed, odontoid, starlike, stellated, stelliform, sagittate, sagittiform, arrowheaded, arrowy, barbed, spurred, acinaciform, apiculate, apiculated, aristate, awned, awny, bearded, calamiform, cone-shaped, coniform, crestate, echinate, gladiate, lanceolate, lanciform, awl, awl-shaped, lance-shaped, awl- shaped, scimitar-shaped, sword-shaped, setarious, spinuliferous, subulate, tetrahedral, xiphoid, cutting, sharp edged, knife edged, sharp as a razor, keen as a razor, sharp as a needle, sharp as a tack, sharpened, set.

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.

blade apple, blade bit, blade roast, fan blade, knife blade, leaf blade, roller blade, rotor blade, rudder blade, shoulder blade, wiper blade