[ bur ]
/ bɜr /
a rough, prickly case around the seeds of certain plants, as the chestnut or burdock.
any bur-bearing plant.
something that adheres like a bur.
Machinery. burr1 (defs. 1, 3).
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.
Surgery. a cutting tool resembling that of a dentist, used for the excavation of bone.
verb (used with object), burred, bur·ring.
to extract or remove burs from.
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Origin of bur1
1300–50; Middle English burre, apparently cognate with Danish burre,Norwegian, Swedish borre bur
Definition for bur (2 of 4)
[ bur ]
/ bɜr /
Definition for bur (3 of 4)
Definition for bur (4 of 4)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for bur (1 of 3)
/ (bɜː) /
verb burs, burring or burred
(tr) to remove burs from
Also (for senses 1–4): burr
Word Origin for bur
C14: probably of Scandinavian origin; compare Danish burre bur, Swedish kardborre burdock
British Dictionary definitions for bur (2 of 3)
Myanmar (international car registration)
Word Origin for BUR
British Dictionary definitions for bur (3 of 3)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for bur
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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for bur
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.