/ Dictionary / Index L Lassa: Meaning and Definition of Find definitions for: Las•sa Pronunciation: (lä'su, -sä, las'u), [key] — n. Lhasa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lassa (Thesaurus) lass Lassa fever Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language