Meaning of ENERGY in English

ENERGY

I. ˈenə(r)jē, -ji noun

( -es )

Etymology: Late Latin energia, from Greek energeia activity, operation, from energos active, effective, from en in + ergon work — more at in , work

1. of language or style : imaginative or affective force : vitality

2. : the capacity of acting, operating, or producing an effect : inherent power

an individual of great intellectual energy

he expended his energies in useless tasks

3. : power efficiently and forcefully exerted : vigorous or effectual operation : vigorousness

the energy and success of an argument

4.

a. : the realized state of potentialities as opposed to their unrealized state — compare entelechy

b.

(1) : activity ; especially : psychical activity

(2) : the product of activity : effect

5. : an entity rated as the most fundamental of all physical concepts and usually regarded as the equivalent of or the capacity for doing work either being associated with material bodies (as a coiled spring or speeding train) or having an existence independent of matter (as light or X rays traversing a vacuum), its physical dimensions being the same as those of work ML 2 ÷T 2 where M is mass, L length, and T time, usually being expressed in work units (as foot-pounds or ergs), and in any form being endowed with the properties of mass (as inertia, momentum, gravitation) by relativity which assigns to the energy E an equivalent mass m by the equation m=E÷c 2 where c is the speed of light — see conservation of energy , kinetic energy , potential energy

6. : muzzle energy

Synonyms: see power

II. noun

: usable power ; also : the resources for producing such power

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.