impedance
noun
im·ped·ance
im-ˈpē-dᵊn(t)s 
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 ratio of the pressure to the volume displacement at a given surface in a sound-transmitting medium
Examples of impedance in a Sentence
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Airflow through the chamber is optimized for the perfect balance between front and back, and the company also says that the dual-system five-way crossover design has been specifically tuned for a smooth frequency curve as well as a flat impedance curve.
—
Paul Ridden, New Atlas, 25 Mar. 2025
This expansion causes mechanical stress, leading to the breaking and reforming of the solid electrolyte interphase (SEI), which consumes lithium ions and increases internal impedance.
—Matthew Dawson, Forbes, 26 Nov. 2024
With a nominal impedance of 4 ohms and sensitivity of 89 dB, high-power, high-current, solid-state amplifiers will bring out the very best in these speakers.
—Robert Ross, Robb Report, 26 Mar. 2025
Near the end of the rehabilitation project, there will be some pavement patching work at the north end near the junction of the Kennedy impedance.
—Carolyn Stein, Chicago Tribune, 11 Mar. 2025
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Paul Ridden, New Atlas, 25 Mar. 2025
This expansion causes mechanical stress, leading to the breaking and reforming of the solid electrolyte interphase (SEI), which consumes lithium ions and increases internal impedance.
—Matthew Dawson, Forbes, 26 Nov. 2024
With a nominal impedance of 4 ohms and sensitivity of 89 dB, high-power, high-current, solid-state amplifiers will bring out the very best in these speakers.
—Robert Ross, Robb Report, 26 Mar. 2025
Near the end of the rehabilitation project, there will be some pavement patching work at the north end near the junction of the Kennedy impedance.
—Carolyn Stein, Chicago Tribune, 11 Mar. 2025
See All Example Sentences for impedance
Cite this Entry
“Impedance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/impedance. Accessed 22 Apr. 2025.
Copy CitationMedical Definition
impedance
noun
im·ped·ance
im-ˈpēd-ᵊn(t)s
1
: 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
2
: the ratio of the pressure to the volume displacement at a given surface in a sound-transmitting medium
3
: opposition to blood flow in the circulatory system
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