Pneumatic

1. Of, relating to, or resembling air or other gases
2. Of or relating to pneumatics
3. Powered by, or filled with, compressed air
4. a pneumatic instrument or engine
5. (zoology) Having cavities filled with air
6. pneumatic cells or bones
7. Spiritual; of or relating to the pneuma
8. (of a woman) well-rounded; full-breasted; bouncy

(resembling air): aereous, airy, gaseous; gaseous

(relating to pneumatics):

(powered by compressed air):

(having cavities filled with air):

(spiritual): pneumenous

(of a woman): voluptuous