ambitus Your browser does not support the audio element. [ Latin , the going round ] Definition 1. A Medieval term that refers to the range of pitches used in a melodic line or voice of a composition. An ambitus is considered narrow if it is a sixth or less, normal if it is about an octave, and wide if it is an eleventh or more. 2. The pitch range of a mode or plain chant. 3. The pitch range of any musical instrument. Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2013-04-25 01:03:43