(1) a voice composed against the tenor. During the fourteenth century, the contratenor was in the style of the tenor, often slower than the upper voices. During the fifteenth century, composers began distinguishing between the high contratenor (the `contratenor altus, ` later known as the `altus `) and the low contratenor (the `con... Found on https://www.arlima.net/the-orb/encyclop/culture/music/orbgloss.htm