the range of pitches used in a piece or a melodic line; narrow ambitus is typically a sixth or less, normal ambitus an octave or so, and wide ambitus would be an eleventh or more.

The ambitus of a Gregorian chant is the range, or the distance between the highest and lowest note. Different chants vary widely in their ambitus. Even relatively florid chants like Alleluias may have a narrow ambitus.

A canvassing for votes.

The exterior edge or border of a thing, as the border of a leaf, or the outline of a bivalve shell.