1Containing or operated by air or gas under pressure.
- ‘the machines with pneumatic loading are more efficient’
- 1.1Zoology (chiefly of cavities in the bones of birds) containing air.
- 1.2informal (of a woman) having large breasts.
- ‘a tattoo of a pneumatic girl’
2(chiefly in the context of New Testament theology) relating to the spirit.
An item of pneumatic equipment.‘as with most conventional pneumatics, you have to cock the bolt and load a pellet into the breech by hand before each shot’
- ‘A whole new generation of pneumatics pre-charged with high pressure air metered from a scuba bottle or laboriously pumped up by hand are bringing us back to the designs of the 18th and 19th centuries.’
- ‘Pre-charged pneumatics: These are similar in concept to pump-up pneumatics, but the compressed air is held in large (usually detachable) air bottles filled from a powerful air compressor or scuba tank.’
- ‘At the end I lost time in my final stop as the mechanics topped up my engine's pneumatics, and without that I would easily have beaten him.’
- ‘With a hiss of pneumatics, the helmet lifted open, revealing a youthful boy's face, his eyes staring into eternity and his mouth wide open from surprise.’
- ‘As the door slid open on silent pneumatics, Ian entered with a barely subdued look of triumph.’
- ‘According to New Scientist: ‘Electric motors tend to be too weak, while hydraulics and pneumatics are too heavy for use in robotics or prosthetics.’’
Early 17th century (in pneumatic (sense 2 of the adjective): from French pneumatique or Latin pneumaticus, from Greek pneumatikos, from pneuma ‘wind’, from pnein ‘breathe’.