- (America) IPA: /ˈæm.plɪ.tud/
- The measure of something's size, especially in terms of width or breadth; largeness, magnitude.
- The cathedral of Lincoln […] is a magnificent structure, proportionable to the amplitude of the diocese.
- 1848, 1671, John Milton, “Book the Second”, in Paradise Regain’d. A Poem. In IV Books. To which is Added, Samson Agonistes, London: Printed by J. M[acock] for John Starkey […], OCLC 228732398 ↗:
- amplitude of mind
- 'Thomas Babington Macaulay, The History of England from the Accession of James II'' Chapter 12
- amplitude of comprehension
- (mathematics) The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.
- (physics) The maximum absolute value of some quantity that varies.
- (astronomy) 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.
- (astronomy) 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.
- (firearms) The horizontal line which measures the distance to which a projectile is thrown; the range.