/ Dictionary / Index L lastly: Meaning and Definition of Find definitions for: last•ly Pronunciation: (last'lē, läst'-), [key] — adv. in conclusion; in the last place; finally. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lastly (Thesaurus) Last Judgment last mile Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language