/ Dictionary / Index L lowermost: Meaning and Definition of Find definitions for: low•er•most Pronunciation: (lō'ur-mōst" or, esp. Brit., -must), [key] — adj. lowest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lowermost (Thesaurus) Lower Michigan Lower Palatinate Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language