/ Dictionary / Index S sunder: Meaning and Definition of Find definitions for: sun•der Pronunciation: (sun'dur), [key] — v.t. to separate; part; divide; sever. —v.i. to become separated; part. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sunder (Thesaurus) sun deck Sunderland Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language