Definition of ascendant noun from the Oxford Advanced Learner's Dictionary

 

ascendant

 noun
(also ascendent)noun
BrE BrE//əˈsendənt//
 
; NAmE NAmE//əˈsendənt//
 
(also rising sign)
 
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  • the sign of the zodiac that is on the eastern horizon at the time and location of an event, particularly a birth I’m a Capricorn but my ascendant is Leo.
  • Word Origin late Middle English: via Old French from Latin ascendent- ‘climbing up’, from the verb ascendere, from ad- ‘to’ + scandere ‘to climb’.Idioms (formal) being or becoming more powerful or popular British pop music is once again in the ascendant.
    See the Oxford Advanced American Dictionary entry: ascendant