amplitude

(ămˈplĭ-to͞odˌ, -tyo͞odˌ)

1. Greatness of size; magnitude.
2. Fullness; copiousness.
3. Breadth or range, as of intelligence.
4. Astronomy The angular distance along the horizon from true east or west to the intersection of the vertical circle of a celestial body with the horizon.
5. Physics The maximum absolute value of a periodically varying quantity.
6. Mathematics
   a. The maximum absolute value of a periodic curve measured along its vertical axis.
   b. The angle made with the positive horizontal axis by the vector representation of a complex number.
7. Electronics The maximum absolute value reached by a voltage or current waveform.