Definitions
1.nounBeing in control; superiority, or commanding influence; ascendency."One man has the ascendant over another."
2.nounAn ancestor (antonym of descendant)
3.noun(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."
4.nounAscent; height; elevation.
5.nounThe 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.