the capacity for vigorous activity; available power: I eat chocolate to get quick energy.
an adequate or abundant amount of such power: I seem to have no energy these days.
Often energies. a feeling of tension caused or seeming to be caused by an excess of such power: to work off one's energies at tennis.
an exertion of such power: She plays tennis with great energy.
the habit of vigorous activity; vigor as a characteristic: Foreigners both admire and laugh at American energy.
the ability to act, lead others, effect, etc., forcefully.
forcefulness of expression: a writing style abounding with energy.
Physics. the capacity to do work; the property of a system that diminishes when the system does work on any other system, by an amount equal to the work so done; potential energy. Symbol: E
any source of usable power, as fossil fuel, electricity, or solar radiation.
- hy·per·en·er·gy, noun
- self-en·er·gy, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use energy in a sentence
Some of that energy enters the water, and when it does, the seismic waves slow down, becoming T waves.Underwater earthquakes’ sound waves reveal changes in ocean warming | Carolyn Gramling | September 17, 2020 | Science News
Launched in 2015, the project’s purpose is to determine the feasibility of underwater data centers powered by offshore renewable energy.Microsoft Had a Crazy Idea to Put Servers Under Water—and It Totally Worked | Vanessa Bates Ramirez | September 17, 2020 | Singularity Hub
This energy, “orgone,” was supposedly a life-force of sorts.This scientist thought he’d found the source of all sexual energy | PopSci Staff | September 17, 2020 | Popular-Science
This represents a revolutionary shift in our ability to capture solar energy in real time rather than being dependent on solar energy of the past.
Yet negotiations over the final shape of a deal are set to be fraught amid national differences in wealth, energy sources and industrial strength.Europe doubles down on a pandemic recovery plan that’s green to the core | Bernhard Warner | September 16, 2020 | Fortune
I think a lot of it has to do with the attitude and the energy behind it and the honesty.‘Black Dynamite’ Presents Police Brutality: The Musical | Stereo Williams | January 9, 2015 | THE DAILY BEAST
Total oil production figures include crude oil, natural gas liquids, and other liquid energy products.
The energy economy has always been a fixture of Texas life, and that has not changed.
Day by day, it drives people to distraction by diverting energy to mindless legal compliance.
Chickens require significantly less land, water, and energy than all other meat options except farmed salmon.The History of the Chicken: How This Humble Bird Saved Humanity | William O’Connor | December 27, 2014 | THE DAILY BEAST
This is the first and principal point at which we can stanch the wastage of teaching energy that now goes on.The Salvaging Of Civilisation | H. G. (Herbert George) Wells
Sleek finds it far harder work than fortune-making; but he pursues his Will-o'-the-Wisp with untiring energy.The Pit Town Coronet, Volume I (of 3) | Charles James Wills
This may be done by taking the humming tone and bringing to bear upon it a strong pressure of energy.Expressive Voice Culture | Jessie Eldridge Southwick
It was, of course, the suppressed emotional energy finding another outlet.The Wave | Algernon Blackwood
She was putting her papers tidy again with calm fingers, while his own were almost cramped with the energy of suppressed desire.The Wave | Algernon Blackwood
British Dictionary definitions for energy
intensity or vitality of action or expression; forcefulness
capacity or tendency for intense activity; vigour
vigorous or intense action; exertion
the capacity of a body or system to do work
a measure of this capacity, expressed as the work that it does in changing to some specified reference state. It is measured in joules (SI units): Symbol: E
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for energy
The capacity or power to do work, such as the capacity to move an object (of a given mass) by the application of force. Energy can exist in a variety of forms, such as electrical, mechanical, chemical, thermal, or nuclear, and can be transformed from one form to another. It is measured by the amount of work done, usually in joules or watts. See also conservation of energy kinetic energy potential energy. Compare power work.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for energy
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.