suction Meaning in the Cambridge English Dictionary
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Meaning of “suction” in the English Dictionary

"suction" in British English

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suctionnoun [U]

uk   us   /ˈsʌk.ʃən/
the ​act of ​removingair from a ​spaceresulting in a ​lowerpressure in that ​space, either ​causingliquid, ​gases, or other ​substances to ​enter, or ​causing two ​surfaces to ​stick together: a suction ​pump
(Definition of suction from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"suction" in American English

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suctionnoun [U]

 us   /ˈsʌk·ʃən/
the ​process of ​reducingairpressure by ​removingair or ​liquid from an ​enclosedspace, or the ​forcecreated by this reduction that ​causes two ​surfaces to ​stick together: Cylinder ​vacuumcleanersworkentirely by suction.
(Definition of suction from the Cambridge Academic Content Dictionary © Cambridge University Press)
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