The degree to which a lens, mirror, or other optical system converges or diverges light, equal to the reciprocal of the focal length of the device.

plural of refractive power

Synonym of optical power

A form of feminism that actively attempts to challenge and overcome discrimination against women.

(US, historical) A social movement led by Native American youth to demand self-determination for Native Americans in the United States.

A slogan and movement supporting Black self-determination and sometimes separatism, especially in the US in the 1960s and 1970s.

plural of hard power

plural of soft power

plural of power distance

plural of middle power