noun Aviation.

gasoline for use in piston-engined aircraft.

Origin of avgas

First recorded in 1940–45; av(iation) + gas(oline)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for avgas

Historical Examples of avgas

  • Loaded an ore boat with avgas and ammo and ran it up the Seaway.

    The Syndic

    C.M. Kornbluth

  • Food was brought to them from time to time, but it tasted like avgas.

    The Syndic

    C.M. Kornbluth