from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An aircraft, especially a balloon or dirigible, deriving its lift from the buoyancy of surrounding air rather than from aerodynamic motion.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An aircraft, such as a dirigible or balloon, that derives its lift from buoyancy rather than from wings or rotors.
- n. A moored balloon flown in a semi-permanent manner, as a border patrol monitoring balloon affixed at 18,000 feet (~6km).
French aérostat : Greek āero-, aero-; see aero- + Greek statos, standing; see stato-.(American Heritage® Dictionary of the English Language, Fourth Edition)