/ Dictionary / Index D drop siding: Meaning and Definition of Find definitions for: drop' sid"ing Pronunciation: [key] weatherboarding having its upper edges narrowed to fit into grooves or rabbets in its lower edges, and its backs flat against the sheathing or studs of the wall. See illus. underAlso called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dropsical dropsley Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language