Pronunciation: (kun-vek'shun), [key]
1. Physics.the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
2. Meteorol.the vertical transport of atmospheric properties, esp. upward (distinguished from advection).
3. the act of conveying or transmitting.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.