/ Dictionary / Index W Winnipegosis: Meaning and Definition of Find definitions for: Win•ni•pe•go•sis Pronunciation: (win"u-pi-gō'sis), [key] a lake in S Canada, in W Manitoba, W of Lake Winnipeg. 2086 sq. mi. (5405 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Winnipeg Winnipesaukee Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language