1. An ampere.

2. An amplifier, especially one used to amplify music.

1. To amplify.

2. To stimulate or excite. Often used with up: was amped up on coffee.

3. To modify (something) so as to increase its capacity to perform or satisfy: "A batch of roasted or sautéed wild mushrooms can be served as a side dish or amped up with other ingredients" (Regina Schrambling).