Meaning of IMPEDANCE in English

ə̇mˈpēd ə n(t)s noun

( -s )

Etymology: impede + -ance


a. : the apparent opposition in an electrical circuit to the flow of an alternating current that is analogous to the actual electrical resistance to a direct current and that is the ratio of effective electromotive force to the effective current

b. : the resistance to passage of a substance (as water or water vapor) through a film

2. : the ratio of the pressure to the volume displacement at a given surface in a sound-transmitting medium

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.