Main Entry: ¹suc·tion

Pronunciation: \ˈsək-shən\

Function: noun

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