Real Dictionary

burr
If someone has a burr, they speak English with a regional accent in which 'r' sounds are pronounced more strongly than in the standard British way of speaking.
countable noun: A burr is the part of some plants which contains seeds and which has little hooks on the outside so that it sticks to clothes or fur.

Burr in American English
Aaron1756-1836; U.S. political leader: vice president of the U.S. (1801-05): killed Alexander Hamilton in a duel (1804)

burr in American English 1
a rough edge or ridge left on metal or other material by cutting or drilling
noun: a protruding, ragged edge raised on the surface of metal during drilling, shearing, punching, or engraving
transitive verb: to form a rough point or edge on

burr in American English 2
the trilling of r, with uvula or tongue, as in the dialectal speech of northern England and Scotland
to pronounce with a burr
to speak with a burr
noun: a washer placed at the head of a rivet

burr in American English 3
buhrstone
intransitive verb: to speak with a burr
noun: a pronunciation of the r- sound as a uvular trill, as in certain Northern English dialects
transitive verb: to pronounce (words, sounds, etc.) with a burr

burr in American English 4
noun

Burr in British English
noun: Aaron. 1756–1836, US vice-president (1800–04), who fled after killing a political rival in a duel and plotted to create an independent empire in the western US; acquitted (1807) of treason

burr in British English 1
noun: a small power-driven hand-operated rotary file, esp for removing burrs or for machining recesses

burr in British English 2
noun: an articulation of (r) characteristic of certain English dialects, esp the uvular fricative trill of Northumberland or the retroflex r of the West of England
verb: to pronounce (words) with a burr

burr in British English 3
noun: a washer fitting around the end of a rivet

burr in British English 4
noun

burr in Mechanical Engineering
noun: A burr is a rough edge on a workpiece after it has been cut, drilled, etc.