amplitude

Short definition from Wiktionary

Noun

1. 1
   The measure of the size of something, especially its width or breadth; largeness, magnitude.
2. 2
   The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.
3. 3
   The maximum absolute value of some quantity that varies.
4. 4
   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.
5. 5
   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.
6. 6
   The horizontal line which measures the distance to which a projectile is thrown; the range.
7. 7
   The range of motion of the gymnast's body while performing a skill.
8. 8
   The range of environmental conditions in which an organism can survive.