/ Dictionary / Index Z zwieback: Meaning and Definition of Find definitions for: zwie•back Pronunciation: (zwī'bak", -bäk", zwē'-, swī'-, swē'- Ger. tsvē'bäk"), [key] — n. a special egg bread made into rusks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: zwieback (Thesaurus) Zwicky Zwingli Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language