hot line

noun
1.
a direct telecommunications link, as a telephone line or Teletype circuit, enabling immediate communication between heads of state in an international crisis: the hot line between Washington and Moscow.
2.
a telephone service enabling people to talk confidentially with someone about a personal problem or crisis.
3.
a telephone line providing customers or clients with direct access to a company or professional service.
Also, hotline.


Origin:
1950–55

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Idioms & Phrases

hot line

A telephone line that gives quick and direct access to a source of information or help. For example, Our state has an AIDS hot line in every county. This term was originally (and is still) used for a direct link between heads of government for use during a crisis, but was quickly extended to wider applications. [1950s]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
She organized an anti-Landmark hot line and publications clearinghouse.
The president urged those homeowners distressed by rising mortgage payments to call a federal hot line for advice.
The two countries agreed to open a hot line between the two prime ministers and schedule regular visits between top leaders.
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