/ Dictionary / Index S sicker: Meaning and Definition of Find definitions for: sick•er Pronunciation: (sik'ur), [key] withas superl. sick•er Pronunciation: (sik'ur), [key] — Scot. and North Eng. Scot. and North Eng. —adj. safe from danger; secure. dependable; trustworthy. —adv. certainly; without doubt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sicker (Thesaurus) sickening Sickert Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language