BUR definition | Dictionary.com

bur

1 [bur]

noun, verb, burred, bur⋅ring.

–noun

1.	a rough, prickly case around the seeds of certain plants, as the chestnut or burdock.

2.	any bur-bearing plant.

3.	something that adheres like a bur.

4.	Machinery. burr ¹ (defs. 1, 3).

5.	Dentistry. a rotary cutting tool usually of steel or other hard metal shaped into a shank and a head, for removing carious material from teeth and preparing cavities for filling.

6.	Surgery. a cutting tool resembling that of a dentist, used for the excavation of bone.

–verb (used with object)

7.	to extract or remove burs from.

Origin:
1300–50; ME burre, appar. c. Dan burre, Norw, Sw borre bur

bur

2 [bur]

–noun

burr ² .

Bur.

Burma.

bur.

bureau.

burr

1 [bur]

–noun

1.	Also, buhr. a protruding, ragged edge raised on the surface of metal during drilling, shearing, punching, or engraving.

2.	a rough or irregular protuberance on any object, as on a tree.

3.	a small, hand-held, power-driven milling cutter, used by machinists and die makers for deepening, widening, or undercutting small recesses.

4.	a lump of brick fused or warped in firing.

–verb (used with object)

5.	to form a rough point or edge on.

deburr.

Also, bur (for defs. 1, 3).

Origin:
1605–15; sp. var. of bur ¹

burr

2 [bur]

–noun

1.	a washer placed at the head of a rivet.

2.	a blank punched out of a piece of sheet metal.

Also, bur.

Origin:
1375–1425; late ME burrewez (pl.), buruhe circle, var. of brough round tower; see broch

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To BUR

bur¹ also burr (bûr)

1. A rough prickly husk or covering surrounding the seeds or fruits of plants such as the chestnut or the burdock.
2. A plant producing such husks or coverings.
A persistently clinging or nettlesome person or thing.
A rough protuberance, especially a burl on a tree.
Any of various rotary cutting tools designed to be attached to a drill.

[Middle English burre, of Scandinavian origin.]

bur² (bûr)

n. & v.
Variant of burr².

bur³ (bûr)

n. Variant of burr³.

burr² also bur (bûr)

A trilling of the letter r, usually made with the tip of the tongue and characteristic of Scottish speech.
A buzzing or whirring sound.

v.   burred, burr·ing, burrs also burs

v.   tr.
To pronounce with a burr.
v.   intr.

To speak with a burr.
To make a buzzing or whirring sound.

[Imitative.]

burr³ also bur (bûr)

n. A washer that fits around the smaller end of a rivet.

[Middle English burre, ring, disk, alteration of burwhe, circle, disk.]

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Bur

Bur\, Burr \Burr\, n. [OE. burre burdock; cf. Dan. borre, OSw. borra, burdock, thistle; perh. akin to E. bristle (burr- for burz-), or perh. to F. bourre hair, wool, stuff; also, according to Cotgrave, "the downe, or hairie coat, wherewith divers herbes, fruits, and flowers, are covered," fr. L. burrae trifles, LL. reburrus rough.]

1. (Bot.) 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. Also, any weed which bears burs.

Amongst rude burs and thistles. --Milton.

Bur and brake and brier. --Tennyson.

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

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

4. The lobe of the ear. See Burr, n., 5.

5. The sweetbread.

6. A clinker; a partially vitrified brick.

7. (Mech.) (a) A small circular saw. (b) A triangular chisel. (c) A drill with a serrated head larger than the shank; -- used by dentists.

8. [Cf. Gael. borr, borra, a knob, bunch.] (Zo["o]l.) The round knob of an antler next to a deer's head. [Commonly written burr.]

Bur oak (Bot.), a useful and ornamental species of oak (Quercus macrocarpa) with ovoid acorns inclosed in deep cups imbricated with pointed scales. It grows in the Middle and Western United States, and its wood is tough, close-grained, and durable.

Bur reed (Bot.), a plant of the genus Sparganium, having long ribbonlike leaves.

Language Translation for : BUR

Spanish: jaula,

German: der Käfig,

Japanese: おり

More Translations »

bur

"prickly seed vessel of some plants," c.1330, burre, from Scand. (cf. Dan. borre, Sw. hard-borre, O.N. burst "bristle"), from PIE *bhors- (see bristle). Transferred 1611 to "rough edge on metal," which may have been the source of the sense "rough sound of the letter -r-" (see burr).

Main Entry: bur
Pronunciation: 'b&r
Function: noun
1 usually burr : a small surgical cutting tool (as for making an opening inbone)
2 : a bit used on a dental drill

bur or burr (bûr)
n.

A rotary cutting instrument used in dentistry for excavating decay, shaping cavity forms, and reducing tooth structure.
A drilling tool for enlarging a trephine hole in the cranium.

bur also burr (bûr) Pronunciation Key
A type of pseudocarp in which the outer surface possesses hooks or barbs. Burs become caught in the feathers or hair of animals, which then carry them away to disperse the seeds.

BUR

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