heavier-than-air

adjective2

1. •
   Weighing more than the volume of air which it displaces.

   • And folks laughed at Santos Dumont, at the Wrights, and at all the other fellows, who said they could take a heavier-than-air machine, and skim above the clouds like a bird. — 1914
2. •
   Of, pertaining to, or using an aircraft which weighs more than the volume of air it displaces.