/ Dictionary / Index S subsoil: Meaning and Definition of Find definitions for: sub•soil Pronunciation: (sub'soil"), [key] — n. the bed or stratum of earth or earthy material immediately under the surface soil. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: subsoil (Thesaurus) subsocial subsoiler Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language