adjective also: pneumatical (njʊˈmætɪkəl)1. of or concerned with air, gases, or wind
Compare hydraulic 2. (of a machine or device) operated by compressed air or by a vacuum
a pneumatic drill
pneumatic brakes
3. containing compressed air
a pneumatic tyre
4. of or concerned with pneumatics
5. theologya. of or relating to the soul or spirit
b. of or relating to the Holy Ghost or other spiritual beings
6. (of the bones of birds) containing air spaces which reduce their weight as an adaptation to flying
7. informal (of a woman) well rounded, esp with a large bosom
noun8. short for pneumatic tyre
Word origin
C17: from Late Latin
pneumaticus of air or wind, from Greek
pneumatikos of air or breath, from
pneuma