/ Dictionary / Index L lallation: Meaning and Definition of Find definitions for: lal•la•tion Pronunciation: (la-lā'shun), [key] — n. Phonet. a speech defect in which l is pronounced instead of r, or in which an l-sound is mispronounced. Cf. lambdacism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lallation (Thesaurus) Lallans L'Allegro* Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language