intransitive verb
Definition: To produce a low, continuous, buzzing or whirring sound, often associated with machinery or certain vocal qualities.
Example: The engine began to burr as it warmed up.
noun
Definition: A rough edge or area left on a material after it has been cut or shaped, or a buzzing sound.
Example: The metal had a sharp burr that needed to be smoothed out before use.
transitive verb
Definition: To create a rough edge or sound on something, often by cutting or shaping it.
Example: He used a file to burr the edges of the metal piece.