▸ noun: (physics) A force which pushes matter from one space into another because the pressure inside the second space is lower than the pressure in the first. ▸ noun: (physics) A force holding two objects together because the pressure in the space between the items is lower than the pressure outside that space. ▸ noun: The process of creating an imbalance in pressure to draw matter from one place to another. ▸ noun: (dentistry) A device for removing saliva from a patient's mouth during dental operations, a saliva ejector. ▸ noun: (informal) influence; "pull". ▸ verb: To create an imbalance in pressure between one space and another in order to draw matter between the spaces. ▸ verb: To draw out the contents of a space.
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