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.Mathematicsa. 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.