Merriam-Webster.com defines “power” as (bold added):
1 a (1) : ability to act or produce an effect (2) : ability to get extra-base hits (3) : capacity for being acted upon or undergoing an effect b : legal or official authority, capacity, or right
2 a : possession of control, authority, or influence over others b : one having such power; specifically : a sovereign state c : a controlling group : establishment —often used in the phrase the powers that be d archaic : a force of armed men e chiefly dialect : a large number or quantity
3 a : physical might b : mental or moral efficacy c : political control or influence
4 plural : an order of angels — see celestial hierarchy
5 a : the number of times as indicated by an exponent that a number occurs as a factor in a product <5 to the third power is 125>; also : the product itself <8 is a power of 2> b : cardinal number 2
6 a : a source or means of supplying energy; especially : electricity b : motive power c : the time rate at which work is done or energy emitted or transferred
7 : magnification 2b
8 : 1scope 3
9 : the probability of rejecting the null hypothesis in a statistical test when a particular alternative hypothesis happens to be true
In short, human power is the ability to impact the lives of others.