power pow·er (pou'ər)
n.
The capacity to perform or act effectively.
Strength or force that is exerted or that is capable of being exerted.
The amount of work done per unit time.
A measure of the magnification of an optical instrument, such as a microscope or telescope.
power [%PREMIUM_LINK%] (pou'ər) Pronunciation Key

In physics, the amount of energy put out or produced in a given amount of time. Power is often measured in watts or kilowatts.
In mathematics, a power is a number multiplied by itself the number of times signified by an exponent placed to the right and above it. Thus, 32, which means 3 × 3, is a power — the second power of three, or three squared, or nine. The expression 106, or ten to the sixth power, means 10 × 10 × 10 × 10 × 10 × 10, or one million.