/ Dictionary / Index A advection: Meaning and Definition of Find definitions for: ad•vec•tion Pronunciation: (ad-vek'shun), [key] — n. the horizontal transport of atmospheric properties (distinguished from convection). the horizontal flow of air, water, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: advection (Thesaurus) advect advection fog Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language