impedance.
The act of impeding; that which impedes; a hindrance.
Meaning & usage
The act of impeding; that which impedes; a hindrance.
A measure of the opposition to the flow of an alternating current in a circuit; the aggregation of its resistance, and inductive and capacitive reactances; the ratio of voltage to current treated as complex quantities.
A quantity analogous to electrical impedance in some other energy domain a measure of opposition to motion of something subjected to a force; the ratio of force to velocity treated as complex quantities.
A quantity analogous to electrical impedance in some other energy domain the ratio of sound pressure to volume flow rate treated as complex quantities.
Where this word comes from
From impede + -ance. In sense 2 and sense 3 it was coined by English mathematician and physicist Oliver Heaviside in 1886.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.