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impedance

The definition of an impedance is any obstruction, or the measure of the opposition of an electric current to the energy flow when voltage is applied.

(noun)

An example of impedance is when a school marching band cannot participate in a parade because they can't affort the cost of gas for the bus.
An example of impedance is a line of resistance within an electrical current.

See impedance in Webster's New World College Dictionary

noun

the total opposition offered by an electric circuit to the flow of an alternating current of a single frequency: it is a combination of resistance and reactance and is measured in ohms: the reciprocal of admittance: symbol, Z
the ratio of the force per unit area to the volume displacement of a given surface across which sound is being transmitted

Origin: < imped(e) + -ance

See impedance in American Heritage Dictionary 4

noun

Symbol Z A measure of the total opposition to current flow in an alternating current circuit, made up of two components, ohmic resistance and reactance, and usually represented in complex notation as Z = R + iX, where R is the ohmic resistance and X is the reactance.
An analogous measure of resistance to an alternating effect, as the resistance to vibration of the medium in sound transmission.

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