Real Dictionary

energy
an extensive area of land regarded as being visually distinct [...]
anything serving to obstruct passage or to maintain separation, such as a fence or gate [...]
intensity or vitality of action or expression; forcefulness [...]
the act, process, or system of transferring, or the state of being transferred [...]
the maintenance of metabolic equilibrium within an animal by a tendency to compensate for disrupting changes [...]
the natural action or intended purpose of a person or thing in a specific role [...]
to reduce to or estimate at the least possible degree or amount [...]
Your energies are your efforts and attention, which you can direct towards a particular aim.
uncountable noun: Energy is determination and enthusiasm about doing things.
uncountable noun: Energy is the ability and strength to do active physical things and the feeling that you are full of physical power and life.