The impetus behind all motion and all activity. / The capacity to do work.

plural of energy

(idiomatic) One who is especially lively, continually active, or industrious. / (idiomatic) The energy associated with being lively, continually active, or industrious.

The range of energy sources of a region, either renewable or non-renewable.

The amount of energy, measured in calories, that a person uses (e.g. during a particular activity).

(physics) The conversion of one form of energy into another, or the movement of energy from one place to another.

An economic problem caused by a dwindling supply of energy, at an increasing price.

The condition of a region, country or household not having enough energy resources for the needs of its population.

Non-polluting source of energy.

A highly caffeinated, sometimes carbonated, beverage containing added ingredients advertised as increasing alertness, performance etc.