- A pump used to exhaust from a condenser the condensed steam, the water used for condensing, and any commingled air.
- A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air or force it into a closed space.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). air pump. Retrieved September 22, 2026, from http://smartdefine.org/air_pump/definitions/1971983 |
| Chicago | Webster's. 2011. "air pump" http://smartdefine.org/air_pump/definitions/1971983 (accessed September 22, 2026). |
| Harvard | Webster's 2011, air pump, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/air_pump/definitions/1971983>. |
| MLA | Webster's. "air pump" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/air_pump/definitions/1971983> |