1. To demand or instruct that one come to or appear at some place or thing. The president summoned the congressional leader to his office to explain the status of the tax legislation. He summoned me to the front of the class to read the note out loud.

2. To demand or instruct that one do something; to order one to take a particular action. I summoned the criminal to lay down his weapon and surrender. The boss summoned him to deliver the package himself.