ampere

noun
am·​pere | \ ˈam-ˌpir How to pronounce ampere (audio) also -ˌper How to pronounce ampere (audio) \

Definition of ampere

 (Entry 1 of 2)

1 : the practical meter-kilogram-second unit of electric current that is equivalent to a flow of one coulomb per second or to the steady current produced by one volt applied across a resistance of one ohm
2 : the base unit of electric current in the International System of Units that is equal to a constant current which when maintained in two straight parallel conductors of infinite length and negligible circular sections one meter apart in a vacuum produces between the conductors a force equal to 2 × 10−7 newton per meter of length

Ampère

biographical name
Am·​père | \ äⁿ-ˈper How to pronounce Ampère (audio) \

Definition of Ampère (Entry 2 of 2)

André-Marie 1775–1836 French physicist

Examples of ampere in a Sentence

Noun a current of 15 amperes
Recent Examples on the Web: Noun To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, "The pandemic will curb office space, one tech investor says," 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, "The pandemic will curb office space, one tech investor says," 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, "The pandemic will curb office space, one tech investor says," 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Adam Lashinsky, Fortune, "The pandemic will curb office space, one tech investor says," 24 Apr. 2020 To get the atoms whipping around the inner chamber of the Russian-nesting-doll-like machine, a magnet will drive 15 million amperes of electricity through them. Laura Mallonee, Wired, "Fusion Energy Gets Ready to Shine—Finally," 21 Apr. 2020 Each bolt contained about 10,000 amperes of current at its peak. Eric Berger & Lee Hutchinson, Ars Technica, "The Greatest Leap, part 5: Saving the crew of Apollo 13," 20 July 2019 Each bolt contained about 10,000 amperes of current at its peak. Eric Berger & Lee Hutchinson, Ars Technica, "The Greatest Leap, part 5: Saving the crew of Apollo 13," 20 July 2019 Each bolt contained about 10,000 amperes of current at its peak. Eric Berger & Lee Hutchinson, Ars Technica, "The Greatest Leap, part 5: Saving the crew of Apollo 13," 20 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ampere.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ampere

Noun

1881, in the meaning defined at sense 1

History and Etymology for ampere

Noun

André-Marie Ampère

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Time Traveler for ampere

Time Traveler

The first known use of ampere was in 1881

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Cite this Entry

“Ampere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ampere. Accessed 27 Sep. 2020.

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More Definitions for ampere

ampere

noun
How to pronounce Ampère (audio) How to pronounce Ampère (audio)

English Language Learners Definition of ampere

technical : a unit for measuring the rate at which electric current flows

ampere

noun
am·​pere | \ ˈam-ˌpir How to pronounce ampere (audio) \

Kids Definition of ampere

: a unit for measuring the strength of an electric current

ampere

noun
am·​pere | \ ˈam-ˌpi(ə)r also -ˌpe(ə)r \

Medical Definition of ampere

1 : the practical mks unit of electric current that is equivalent to a flow of one coulomb per second or to the steady current produced by one volt applied across a resistance of one ohm
2 : the base unit of electric current in the International System of Units that is equal to a constant current which when maintained in two straight parallel conductors of infinite length and negligible circular sections one meter apart in a vacuum produces between the conductors a force equal to 2 × 10−7 newton per meter of length

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More from Merriam-Webster on ampere

Nglish: Translation of ampere for Spanish Speakers

Britannica English: Translation of ampere for Arabic Speakers

Britannica.com: Encyclopedia article about ampere

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