dial tone Hear it!

dial tone definition

☆ dial tone

a buzzing or humming sound indicating to the user of a telephone that the line is open and a number may be dialed

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.