/ Dictionary / Index D dissipation trail: Meaning and Definition of Find definitions for: dissipa'tion trail" Pronunciation: [key] a clear rift left behind an aircraft flying through a thin cloud layer. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dissipation dissociable Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language