Pronunciation: (u-sen'dunt),[key] —n. 1. a position of dominance or controlling influence: possession of power, superiority, or preeminence: With his rivals in the ascendant, he soon lost his position. 2. an ancestor; forebear.
3. Astrol.the point of the ecliptic or the sign and degree of the zodiac rising above the eastern horizon at the time of a birth or event: the cusp of the first house.