plural energies
1
: ability to be active : the physical or mental strength that allows you to do things
The kids are always so full of energy.
They devoted all their energy to the completion of the project.
I have a lot of nervous energy. [=energy that comes from being nervous]
They devoted all their energies to the completion of the project.
2
: natural enthusiasm and effort
She puts a lot of energy into her work.
3
: usable power that comes from heat, electricity, etc.
The newer appliances conserve more energy.
an energy crisis
renewable energy
4
technical
: the ability of something (such as heat, light, or running water) to be active or do work
kinetic energy
particles with high kinetic energies
5
informal
: a type of power that some people believe a person or place produces
I sense a lot of negative/bad energy coming from her right now.
There's good/positive energy in this room.
Cite this Entry
“Energy.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/energy. Accessed 19 Jun. 2026.
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