hotline
1. A telecommunications link, especially a telephone line, that provides fast, direct access to a source of information, confidential assistance, or emergency aid. We've set up a hotline for any potential witnesses to come forward with information about the incident.
2. A direct and immediate line of communication between the heads of different governments, used especially for or during an international crisis. The hotline between the U.S. and Canada has been in constant use after the terrorist attack at the border of the two countries.
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]