The Collaborative International Dictionary of English v.0.48:
Highflier \High"fli`er\, n. 1. One who is extravagant in pretensions, opinions, or manners; one who is highfaluting. --Swift. [1913 Webster +PJC] 2. a person of great ability and ambition. [WordNet sense 1] Syn: highflyer. [WordNet 1.5]WordNet (r) 3.0 (2006):
highflier n 1: a person of great ability and ambition [syn: highflier, highflyer]