Real Dictionary

power
a rule or set of rules, enforceable by the courts, regulating the government of a state, the relationship between the organs of government and the subjects of the state, and the relationship or conduct of subjects towards each other [...]
ability or capacity to do something [...]
the distribution of colours produced when white light is dispersed by a prism or diffraction grating. There is a continuous change in wavelength from red, the longest wavelength, to violet, the shortest. Seven colours are usually distinguished: violet, in
the division of a physical or abstract whole into its constituent parts to examine or determine their relationship or value [...]
Your power to do something is your ability to do it.
uncountable noun: If it is in or within your power to do something, you are able to do it or you have the resources to deal with it.
uncountable noun: If someone has power, they have a lot of control over people and activities.