/ Dictionary / Index W Wallach: Meaning and Definition of Find definitions for: Wal•lach Pronunciation: (wol'uk Ger. väl'ä&khlig), [key] 1847–1931, German chemist: Nobel prize 1910. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Wallace's line Wallachia Related Content Daily Word Quiz: banshee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language