/ Dictionary / Index L lasso: Meaning and Definition of Find definitions for: las•so Pronunciation: (las'ō, la-s'), [key] — n., pl. v., -sos, -soes, -soed, -so•ing. —n. a long rope or line of hide or other material with a running noose at one end, used for roping horses, cattle, etc. —v.t. to catch with or as with a lasso. Las•so Pronunciation: (lä'sō), [key] (Orlandus Lassus), 1532–94, Flemish composer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lasso (Thesaurus) lassitude last Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language