/ Dictionary / Index T topsoil: Meaning and Definition of Find definitions for: top•soil Pronunciation: (top'soil"), [key] — n. the fertile, upper part of the soil. —v.t. to cover (land) with topsoil. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: topsoil (Thesaurus) topsmelt topspin Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language