suction (Noun) — A force over an area produced by a pressure difference.
suction (Noun) — The act of sucking.
suction (Verb) — Remove or draw away by the force of suction. ex. "the doctors had to suction the water from the patient's lungs"
suction (Verb) — Empty or clean (a body cavity) by the force of suction. ex. "suction the uterus in an abortion"