/ Dictionary / Index S soap powder: Meaning and Definition of Find definitions for: soap' pow"der Pronunciation: [key] soap produced and packaged in powdered form. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. soap plant soapstone Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language