busy tone
originally US
noun
A sound indicating to a caller that a telephone line is engaged.
Origin
Early 20th century.
- head knife
- headlamp
- headland
- headland speech
- head lease
- headledge
- headless
- headless chicken
- headless cross
- head lessee
- headless horse
- headless horseman
- headlessness
- headlet
- headlight
- head line
- headline
- headline-ese
- headline-grabber
- headline-grabbing
- headline maker
- head linen
- headline news
- headliner
- headlinese