- Energy is defined as the capacity for activity or the exertion of power.
- An example of energy is a person being able to run five miles just after waking up.
- An example of energy is what is created by a wind turbine.
A runner needs a lot of energy.
energy definition by Webster's New World
- force of expression or utterance
- potential forces; inherent power; capacity for vigorous action
- such forces or power, esp. in action: to apply all one's energies
- strength or power efficiently exerted
- those resources, as petroleum, coal, gas, wind, nuclear fuel, and sunlight, from which energy in the form of electricity, heat, etc. can be produced
- the available supply of such usable resources: an energy shortage
- Physics the capacity for doing work: abbrev. E
Origin: Late Latin energia ; from Classical Greek energeia ; from energēs, active, at work ; from en-, in plush ergon, work
energy definition by American Heritage Dictionary
noun pl. en·er·gies
- The capacity for work or vigorous activity; vigor; power. See Synonyms at strength.
- a. Exertion of vigor or power: a project requiring a great deal of time and energy.b. Vitality and intensity of expression: a speech delivered with energy and emotion.
- a. Usable heat or power: Each year Americans consume a high percentage of the world's energy.b. A source of usable power, such as petroleum or coal.
- Physics The capacity of a physical system to do work.
Origin: French énergie, from Late Latin energīa, from Greek energeia, from energos, active : en-, in, at; see en-2 + ergon, work; see werg- in Indo-European roots.
energy - Computer Definition
- In physics, the capacity of a system for doing work. It took a lot of energy to write this book. (Take my word for it, so to speak.) See also physics.
- In physics, referring to a source of energy, electrical, mechanical, or otherwise.
energy - Cultural Definition
- The most important property of energy is that it is conserved — that is, the total energy of an isolated system does not change with time. This is known as the law of conservation of energy. Energy can, however, change form; for example, it can be turned into mass and back again into energy.
energy - Medical Definition
- The capacity for work or vigorous activity; vigor; power.
- The capacity of a physical system to do work.
energy - Science Definition