/ Dictionary / Index S sickness: Meaning and Definition of Find definitions for: sick•ness Pronunciation: (sik'nis), [key] — n. a particular disease or malady. the state or an instance of being sick; illness. nausea; queasiness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sickness (Thesaurus) sickly sicko Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language