Being in control; superiority, or commanding influence; ascendency.

"One man has the ascendant over another."

An ancestor (antonym of descendant)

(usu. followed by to) A royal heir assuming (a place of power)

"Given his father's ghastly demise, one would not expect such glee from the ascendant to his throne."

Ascent; height; elevation.

The horoscope, or that degree of the ecliptic which rises above the horizon at the moment of one's birth; supposed to have a commanding influence on a person's life and fortune.

Rising, moving upward.

Surpassing or controlling.