/ Dictionary / Index S semiofficial: Meaning and Definition of Find definitions for: sem•i•of•fi•cial Pronunciation: (sem"ē-u-fish'ul, sem"ī-), [key] — adj. having some degree of official authority. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: semiofficial (Thesaurus) Seminole Wars semiology Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language