noun
plural -gies
ability to be active :the physical or mental strength that allows you to do things [noncount]
[noncount] :natural enthusiasm and effort
[noncount] :usable power that comes from heat, electricity, etc.
technical :the ability of something (such as heat, light, or running water) to be active or do work [noncount]
[noncount] informal :a type of power that some people believe a person or place produces