/ Dictionary / Index S sized: Meaning and Definition of Find definitions for: sized Pronunciation: (sīzd), [key] — adj. having size as specified (often used in combination): middle-sized. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sized (Thesaurus) sizeable sizer 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