/ Dictionary / Index E eighthly: Meaning and Definition of Find definitions for: eighth•ly Pronunciation: (ātth'lē āth'-), [key] — adv. in the eighth place; eighth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Eighth Commandment eighth note Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language