1.  bur(n = noun.plant) burr - seed vessel having hooks or prickles;
is a kind of pericarp, seed vessel
has particulars: beggar-ticks, spanish needles
Derived form verb bur₁

2.  bur(n = noun.artifact) burr - small bit used in dentistry or surgery;
is a kind of bit
is a part of burr drill, dentist's drill

   bur(v = verb.change) burr - remove the burrs from;
is one way to remove, take, take away, withdraw
Derived form noun bur₁
Sample sentences: Somebody ----s something

1.  Any rough or prickly envelope of the seeds of plants, whether a pericarp, a persistent calyx, or an involucre, as of the chestnut and burdock; a seed vessel having hooks or prickles. Also, any weed which bears burs. [1913 Webster]
"Amongst rude burs and thistles." [1913 Webster]
"Bur and brake and brier." [1913 Webster]

2.  The thin ridge left by a tool in cutting or shaping metal. See Burr, n., 2. [1913 Webster]

3.  A ring of iron on a lance or spear. See Burr, n., 4. [1913 Webster]

4.  The lobe of the ear. See Burr, n., 5. [1913 Webster]

5.  The sweetbread. [1913 Webster]

6.  A clinker; a partially vitrified brick. [1913 Webster]

7.  A small circular saw. [1913 Webster]

8.  The round knob of an antler next to a deer's head. [1913 Webster]

bur, n. (also burr)
1 a a prickly clinging seed-case or flower-head. b any plant producing these.
2 a person hard to shake off.
3 = BURR n. 2.

Idiom:
bur oak a N. American oak, Quercus macrocarpa with large fringed acorn-cups.

Etymology:
ME: cf. Da. burre bur, burdock, Sw. kard-borre burdock

N  coherence, adherence, adhesion, adhesiveness, concretion accretion, conglutination, agglutination, agglomeration, aggregation, consolidation, set, cementation, sticking, soldering, connection, dependence, tenacity, toughness, stickiness, inseparability, inseparableness, bur, remora, conglomerate, concrete, cohesive, adhesive, adhering, cohering, tenacious, tough, sticky, united, unseparated, unsessile, inseparable, inextricable, infrangible, compact.

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  roughness, tooth, grain, texture, ripple, asperity, rugosity, salebrosity, corrugation, nodosity, arborescence, pilosity, brush, hair, beard, shag, mane, whisker, moustache, imperial, tress, lock, curl, ringlet, fimbriae, pili, cilia, villi, lovelock, beaucatcher, curl paper, goatee, papillote, scalp lock, plumage, plumosity, plume, panache, crest, feather, tuft, fringe, toupee, wool, velvet, plush, nap, pile, floss, fur, down, byssus, moss, bur, fluff, knot (convolution), rough, uneven, scabrous, scaly, knotted, rugged, rugose, rugous, knurly, asperous, crisp, salebrous, gnarled, unpolished, unsmooth, roughhewn, craggy, cragged, crankling, scraggy, prickly, arborescent, leafy, well-wooded, feathery, plumose, plumigerous, laciniate, laciniform, laciniose, pappose, pileous, pilose, trichogenous, trichoid, tufted, fimbriated, hairy, ciliated, filamentous, hirsute, crinose, crinite, bushy, hispid, villous, pappous, bearded, pilous, shaggy, shagged, fringed, befringed, setous, setose, setaceous, like quills upon the fretful porcupine, rough as a nutmeg grater, rough as a bear, downy, velvety, flocculent, woolly, lanate, lanated, lanuginous, lanuginose, tomentose, fluffy, against the grain, cabello luengo y corto el seso.

N  engraving, chalcography, line engraving, mezzotint engraving, stipple engraving, chalk engraving, dry point, bur, etching, aquatinta, chiseling, plate engraving, copperplate engraving, steel engraving, wood engraving, xylography, lignography, glyptography, cerography, lithography, chromolithography, photolithography, zincography, glyphography, xylograph, lignograph, glyptograph, cerograph, lithograph, chromolithograph, photolithograph, zincograph, glyphograph, holograph, impression, print, engraving, plate, steelplate, copperplate, etching, mezzotint, aquatint, lithotint, cut, woodcut, stereotype, graphotype, autotype, heliotype, graver, burin, etching point, style, plate, stone, wood block, negative, die, punch, stamp, printing, plate printing, copperplate printing, anastatic printing, color printing, lithographic printing, type printing, three-color process, illustration, illumination, half tone, photogravure, vignette, initial letter, cul de lampe, tailpiece, lapidary, lapidarian, insculptured, engraved, lapidary, sculpsit, imprimit.

buffalo bur, bur fish, bur grass, bur marigold, bur oak, bur reed, trifid bur marigold