pneu·mat·ic
nu̇-ˈma-tik 
nyu̇-
1
: of, relating to, or using gas (such as air or wind):
a
: moved or worked by air pressure
b(1)
: adapted for holding or inflated with compressed air
(2)
: having air-filled cavities
3
: having a well-proportioned feminine figure
especially
: having a full bust
pneu·ma·tic·i·ty
ˌn(y)üməˈtisətē
plural -es
: the quality or state of being pneumatic
specifically
: a condition marked by the presence of air cavities
Synonyms of pneumatic
Examples of pneumatic in a Sentence
Adjective
a movie star who is remembered mainly as a pneumatic sex symbol of the 1950s
Recent Examples on the Web
Eric Twardzik, Robb Report, 15 June 2026
Although there have been recent developments in soft robotics that use heat, most soft robots rely on hydraulic and pneumatic systems to move fluid through their artificial muscles and actuators.
—New Atlas, 12 June 2026
Underneath their colorful cartoon animal exteriors, the animatronics are a skeleton of metal and pneumatic tubes.
—Joseph States, Chicago Tribune, 12 June 2026
The next day she is shipped off to her first job, also within the confines of this impossibly vast building, which involves shoving film canisters down a pneumatic tube.
—Literary Hub, 15 May 2026
See All Example Sentences for pneumatic
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Adjective
Its earliest iteration can be traced back to the 1870s, when Scottish inventor John Boyd Dunlop—best known for patenting the pneumatic tire—made good on his familiarity with rubber to design a low-top canvas shoe with a vulcanized rubber sole.
—Eric Twardzik, Robb Report, 15 June 2026
Although there have been recent developments in soft robotics that use heat, most soft robots rely on hydraulic and pneumatic systems to move fluid through their artificial muscles and actuators.
—New Atlas, 12 June 2026
Underneath their colorful cartoon animal exteriors, the animatronics are a skeleton of metal and pneumatic tubes.
—Joseph States, Chicago Tribune, 12 June 2026
The next day she is shipped off to her first job, also within the confines of this impossibly vast building, which involves shoving film canisters down a pneumatic tube.
—Literary Hub, 15 May 2026
See All Example Sentences for pneumatic
Cite this Entry
“Pneumatic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pneumatic. Accessed 19 Jun. 2026.
Copy CitationKids Definition
pneumatic
adjective
pneu·mat·ic
n(y)u̇-ˈmat-ik
1
: of, relating to, or using air, wind, or other gas
2
: moved or worked by air pressure
a pneumatic drill
3
: made to hold or be inflated with compressed air
pneumatic tires
Etymology
Adjective
from Latin pneumaticus "relating to or using air," from Greek pneumatikos (same meaning), from pneumat-, pneuma "air, breath"
Medical Definition
pneumatic
adjective
pneu·mat·ic
n(y)u̇-ˈmat-ik
: of, relating to, or using gas (as air): as
a
: moved or worked by air pressure
b
: adapted for holding or inflated with compressed air
c
: having air-filled cavities
pneumatic bone
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