burr

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A rough edge or area remaining on material, such as metal, after it has been cast, cut, or drilled.
2. n. Variant of bur¹.
3. v. To form a burr on.
4. v. To remove burrs from.
5. n. A trilling of the letter r, usually made with the tip of the tongue and characteristic of Scottish speech.
6. n. A buzzing or whirring sound.
7. v. To pronounce with a burr.
8. v. To speak with a burr.
9. v. To make a buzzing or whirring sound.
10. n. A washer that fits around the smaller end of a rivet.

Century Dictionary and Cyclopedia

1. n. etc. See bur, bur, etc.

Wiktionary

1. n. A sharp, pointy object, such as a sliver or splinter.
2. n. A bur; a seed pod with sharp features that stick in fur or clothing.
3. n. A small piece of material left on an edge after a cutting operation.
4. n. A rough humming sound.
5. n. A rolled "r".
6. v. transitive To pronounce with a rolled "r".
7. v. intransitive To make a rough humming sound.
8. n. obsolete A metal ring at the top of the hand-rest on a spear.
9. n. UK alternative spelling of burl.

GNU Webster's 1913

1. n. (Bot.) A prickly seed vessel. See bur, 1.
2. n. 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.
3. n. 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.
4. n. A broad iron ring on a tilting lance just below the gripe, to prevent the hand from slipping.
5. n. The lobe or lap of the ear.
6. n. 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.
7. n. The knot at the bottom of an antler. See Bur, n., 8.
8. v. To speak with burr; to make a hoarse or guttural murmur.

WordNet 3.0

1. v. remove the burrs from
2. n. rough projection left on a workpiece after drilling or cutting
3. n. seed vessel having hooks or prickles
4. n. rotary file for smoothing rough edges left on a workpiece
5. n. United States politician who served as vice president under Jefferson; he mortally wounded his political rival Alexander Hamilton in a duel and fled south (1756-1836)
6. n. small bit used in dentistry or surgery