/ Dictionary / Index W Wallace's line: Meaning and Definition of Find definitions for: Wal'lace's line' Pronunciation: [key] — Zoogeog. Zoogeog. an imaginary line that separates the Oriental and Australian zoogeographical regions and passes between Bali and Lombok, west of Celebes, and east of the Philippines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Wallaceburg Wallach 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