Webster's Revised Unabridged Dictionary · 1913

Highflying

Highflying , adjective

1.
Extravagant in opinions or ambition.
Highflying, arbitrary kings. — Dryden
2.
Flying at a high altitude; -- of airplanes.
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.