/ Dictionary / Index S Serratia*: Meaning and Definition of Find definitions for: Ser•ra•tia Pronunciation: (su-rā'shu, -shē-u, -rä'tē-u), [key] — n. Bacteriol. a genus of rod-shaped, aerobic bacteria that are saprophytic on decaying plant or animal materials. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. serrated serration Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language