Breadcrumb Home > Dictionary > Index S soil group: Meaning and Definition of Find definitions for: soil' group" Pronunciation: [key] one of a number of soil classes having the same kinds of horizons in the same sequence and under similar moisture and temperature regimes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. soil creep soil mechanics ✖ Related Content Daily Word Quiz: umbrage Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language