from
The Collaborative International Dictionary of English v.0.48
Burr \Burr\ (b[^u]r), n. [See {Bur}.] (Bot.)
1. A prickly seed vessel. See {Bur}, 1.
[1913 Webster]
2. The thin edge or ridge left by a tool in cutting or
shaping metal, as in turning, engraving, pressing, etc.;
also, the rough neck left on a bullet in casting.
[1913 Webster]
The graver, in plowing furrows in the surface of the
copper, raises corresponding ridges or burrs.
--Tomlinson.
[1913 Webster]
3. A thin flat piece of metal, formed from a sheet by
punching; a small washer put on the end of a rivet before
it is swaged down.
[1913 Webster]
4. A broad iron ring on a tilting lance just below the gripe,
to prevent the hand from slipping.
[1913 Webster]
5. The lobe or lap of the ear.
[1913 Webster]
6. [Probably of imitative origin.] A guttural pronounciation
of the letter r, produced by trilling the extremity of the
soft palate against the back part of the tongue; rotacism;
-- often called the {Newcastle burr}, {Northumberland
burr}, or {Tweedside burr}.
[1913 Webster]
7. The knot at the bottom of an antler. See {Bur}, n., 8.
[1913 Webster]