/ Dictionary / Index F first-degree murder: Meaning and Definition of Find definitions for: first'-degree' mur'der Pronunciation: [key] — Law. Law. See under(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. first-degree burn first derivative Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language