D defs.my
Entry 3 senses Webster, 1913

Highflying

/hīf'-līˌ-ĭng/ · High·fly·ing · IPA /hˈaɪflˌaɪɪŋ/
01 a. Extravagant in opinions or ambition.
  1. 1.
    Extravagant in opinions or ambition.
  2. 2.
    Flying at a high altitude; -- of airplanes.
  3. 3.
    Having an excessively high cost or perceived value; temporarily very successful; -- of objects with respect to a market and people in their occupations; as, highflying internet stocks; highflying executives moving between companies.