Standard Lemma guide

impedance

noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: [ɪmˈpiːdn̩s]
  • UK: Recorded audio is listed in the source snapshot.
  • Canada, General-American: [ɪmˈpidn̩s]
  • US: Recorded audio is listed in the source snapshot.
  • Australian: [ɪmˈpiːdn̩s]
  • CMU ARPABET: IH2 M P IY1 D AH0 N S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The act of impeding; that which impedes; a hindrance.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

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.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

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.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable, usually

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A quantity analogous to electrical impedance in some other energy domain

the ratio of sound pressure to volume flow rate treated as complex quantities.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable, usually

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

a material's opposition to the flow of electric current; measured in ohms

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: electric resistance, electrical resistance, resistance, resistivity, ohmic resistance

Antonyms: none provided

Broader terms: electrical phenomenon

Narrower terms: ohmage

History

Etymology

From impede + -ance. In sense 2 and sense 3 it was coined by English mathematician and physicist Oliver Heaviside in 1886.

Across languages

Translations

32 source translations are retained for this English entry.

  • Basque: inpedantzia — physics, measure of opposition to flow of current
  • Bulgarian: импеданс (impedans) — physics, measure of opposition to flow of current
  • Chinese Mandarin: 阻抗 (zǔkàng) — physics, measure of opposition to flow of current
  • Czech: impedance — physics, measure of opposition to flow of current
  • Dutch: impedantie — physics, measure of opposition to flow of current
  • Esperanto: impedanco — physics, measure of opposition to flow of current
  • Estonian: impedants — physics, measure of opposition to flow of current
  • Finnish: impedanssi — physics, measure of opposition to flow of current
  • French: impédance — physics, measure of opposition to flow of current
  • German: Impedanz — physics, measure of opposition to flow of current
  • Greek: εμπέδηση (empédisi) — physics, measure of opposition to flow of current
  • Greek: σύνθετη αντίσταση (sýntheti antístasi) — physics, measure of opposition to flow of current
  • Hindi: प्रतिबाधा (pratibādhā) — physics, measure of opposition to flow of current
  • Hungarian: impedancia — physics, measure of opposition to flow of current
  • Indonesian: impedans — physics, measure of opposition to flow of current
  • Indonesian: impedansi — physics, measure of opposition to flow of current
  • Irish: coisceas — physics, measure of opposition to flow of current
  • Italian: impedenza — physics, measure of opposition to flow of current
  • Japanese: インピーダンス (inpīdansu) — physics, measure of opposition to flow of current
  • Korean: 온저항 (onjeohang) — physics, measure of opposition to flow of current
  • Manx: castid — physics, measure of opposition to flow of current
  • Manx: castys — physics, measure of opposition to flow of current
  • Māori: haukotinga — physics, measure of opposition to flow of current
  • Māori: whakararu — physics, measure of opposition to flow of current
  • Persian: امپدانس (ampedâns) — physics, measure of opposition to flow of current
  • Polish: impedancja — physics, measure of opposition to flow of current
  • Portuguese: impedância — physics, measure of opposition to flow of current
  • Romanian: impedanță — physics, measure of opposition to flow of current
  • Russian: импеда́нс (impedáns) — physics, measure of opposition to flow of current
  • Serbo-Croatian: impedancija — physics, measure of opposition to flow of current
  • Spanish: impedancia — physics, measure of opposition to flow of current
  • Turkish: empedans — physics, measure of opposition to flow of current
Real reading context

impedance in complete knowledge articles