(of a machine, vehicle, etc.) having a specified fuel or prime mover: a gasoline-powered engine; an engine-powered pump.

1875–80; power + -ed2

nonpowered, adjective
self-powered, adjective
underpowered, adjective
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World English Dictionary
underpowered (ˌʌndəˈpaʊəd)
lacking or low in power: two-litre cars are underpowered

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

c.1300, from Anglo-Fr. pouair, O.Fr. povoir, noun use of the infinitive in O.Fr., "to be able," earlier podir (842), from V.L. *potere, from L. potis "powerful" (see potent). Meaning "a state or nation with regard to international authority or influence" is from 1726. The
verb meaning "to supply with power" is recorded from 1898. Powerful is c.1400. Powerhouse "building where power is generated" is from 1881; fig. sense attested from 1915. Power-broker (1961) said to have been coined by T.H. White in ref. to the 1960 U.S. presidential election. Phrase the powers that be is from Rom. xiii.1. As a statement wishing good luck, more power to (someone) is recorded from 1842.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

power pow·er (pou'ər)

  1. The capacity to perform or act effectively.

  2. Strength or force that is exerted or that is capable of being exerted.

  3. The amount of work done per unit time.

  4. A measure of the magnification of an optical instrument, such as a microscope or telescope.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
power  [%PREMIUM_LINK%]     (pou'ər)  Pronunciation Key 
  1. The source of energy used to operate a machine or other system.

  2. The rate at which work is done, or energy expended, per unit time. Power is usually measured in watts (especially for electrical power) or horsepower (especially for mechanical power). For a path conducting electrical current, such as a component in an electric circuit, P = VI, where P is the power dissipated along the path, V is the voltage across the path, and I is the current through the path. Compare energy, work.

  3. Mathematics The number of times a number or expression is multiplied by itself, as shown by an exponent. Thus ten to the sixth power, or 106, equals one million.

  4. A number that represents the magnification of an optical instrument, such as a microscope or telescope. A 500-power microscope can magnify an image to 500 times its original size.

The American Heritage® Science Dictionary
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American Heritage
Cultural Dictionary

power definition

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.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
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Published by Houghton Mifflin Company. All rights reserved.
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