Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
A service whereby someone making a phone call is notified of an incoming call and is able to place the first call on hold while answering the second.
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
