amplitude.
The measure of the size of something, especially its width or breadth; largeness, magnitude.
Meaning & usage
The measure of the size of something, especially its width or breadth; largeness, magnitude.
The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.
The maximum absolute value of some quantity that varies.
The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.
The arc of the horizon between the true east or west point and the foot of the vertical circle passing through any star or object.
The horizontal line which measures the distance to which a projectile is thrown; the range.
The range of motion of the gymnast's body while performing a skill.
The range of environmental conditions in which an organism can survive.
Where this word comes from
Etymology tree Proto-Indo-European *h₃emh₃-der. Proto-Indo-European *h₃emh₃-lo-s Proto-Italic *amlos? Proto-Indo-European *h₂ent- Proto-Indo-European *-s Proto-Indo-European *h₂énts? Proto-Indo-European *h₂m̥bʰíder. Proto-Italic *amβi- Latin ambi- Proto-Indo-European *pleh₁- Proto-Indo-European *-nós Proto-Indo-European *pl̥h₁nós Proto-Italic *plēnosder. Latin plēnus? Latin ambiplus? Latin amplus Proto-Indo-European *-tu- Proto-Indo-European *-d- Proto-Indo-European *-Hō Proto-Italic *-tūdō Latin -tūdō Latin amplitūdōder. Middle French amplitudebor. English amplitude Borrowed from Middle French amplitude, from Latin amplitūdō, from amplus (“large”). By surface analysis, ample + -itude.
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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.