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English definition of “suck”

suck

verb [I/T] (PULL IN)   /sʌk/
to pull liquid or air into your mouth without using your teeth, or to move the tongue and muscles of the mouth around something inside your mouth, often in order to dissolve it: [T] The two-year-old sucked his thumb. [I] Sometimes a baby will hold the pacifier in her mouth without really sucking. [I/T] We were all sucking (on) lollipops. Something that sucks something in a particular direction pulls it with great force: [T] The vacuum cleaner sucks dirt into a disposable bag.
(Definition of suck verb (PULL IN) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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