Hotline (noun)

1. A telephone line or service that is available for immediate use, especially in emergencies.
2. A direct telephone link for a specific purpose or organization.
3. A telephone number for people to call for help or information.

Origin:

From hot + line. first recorded in english in the 1920s.

Examples:

1. The police department has a 24-hour hotline for emergencies.
2. The company has a hotline for customers to call with complaints.
3. The government has set up a hotline for citizens to report suspicious activity.
4. The hospital has a hotline for patients to call with questions.
5. The suicide hotline provides support for people in crisis.