Pronunciation: (suk'shun), [key]
1. the act, process, or condition of sucking.
2. the force that, by a pressure differential, attracts a substance or object to the region of lower pressure.
3. the act or process of producing such a force.
to draw out or remove by aspiration.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.