1》 a whirring sound.
↘a rough pronunciation of the letter r , as in some regional accents.
2》 (also bur ) a rough edge left on a metal object by the action of a tool.
3》 (also bur ) a small drill used in woodworking, dentistry, or surgery.
4》 a siliceous rock used for millstones.
5》 (also bur ) a prickly seed case or flower head that clings to clothing and animal fur.
6》 (also bur ) [as modifier ] denoting wood containing a pattern of dense swirls in the grain.
7》 the coronet of a deer's antler.
1》 make a whirring sound.
↘speak with a ~.
2》 form a rough edge on (metal).
ME: prob. of Scand. origin; the accent sense is prob. imitative.