n 1  :  the act or process of sucking  2 a  :  the act or process of exerting a force upon a solid, liquid, or gaseous body by reason of reduced air pressure over part of its surface  b  :  force so exerted  3  :  the act or process of removing secretions or fluids from hollow or tubular organs or cavities by means of a tube and a device (as a suction pump) that operates on negative pressure
vt :  to remove from a body cavity or passage by suction .
 
 
 
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