amplitude Definition

amplitude
noun

1. Spaciousness, wide range or extent.

Thesaurus: breadth, bulk, mass, volume, width, scope, capacity, range, reach, size, dimension, bulk.
2. Abundance.

Thesaurus: abundance, plethora, ampleness, profusion, copiousness, fullness, vastness, spaciousness, largeness, greatness, hugeness, magnitude, plentifulness.
3. physics.
In any quantity that varies in periodic cycles, such as a wave or vibration: the maximum displacement from its mean position, eg the angle between the vertical and the peak position in the swing of a pendulum.
4. astron.
The difference between the maximum and minimum brightness of a variable star.

Etymology: 16c: from Latin amplitudo, from amplus abundant.