/ Dictionary / Index S subcritical: Meaning and Definition of Find definitions for: sub•crit•i•cal Pronunciation: (sub-krit'i-kul), [key] — adj. pertaining to a state, value, or quantity that is less than critical, esp. to a mass of radioactive material. being of less than critical importance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subcover subcrustal Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language