From Longman Dictionary of Contemporary Englishbe in the ascendantbe in the ascendantformalPOWER to be or become powerful or popular a political party that’s in the ascendant → ascendant
Examples from the Corpus
be in the ascendant• Mr Tony Benn was in the ascendant.• During this period, liberal ideas were in the ascendant.• And Mr Desmond's Star is in the ascendant, a full 5.72 per cent ahead. 