What is the meaning of Warn?

To make (someone) aware of (something impending); especially:

  1. To make (someone) aware of impending danger, evil, etc.

    To make (someone) aware of impending danger, evil, etc.

    To notify or inform (someone, about something).

    To summon (someone) to or inform of a formal meeting or duty.

    To make a sound (e.g. clicking or whirring) indicating that it is about to strike or chime (an hour).

    To caution or admonish (someone) against unwise or unacceptable behaviour.

    To advise or order to go or stay away.

    To give warning.

    Alternative form of weren

    Alternative form of wernen

    Source: wiktionary.org