Breadcrumb Home > Dictionary > Index A allergist: Meaning and Definition of Find definitions for: al•ler•gist Pronunciation: (al'ur-jist), [key] — n. a physician specializing in the diagnosis and treatment of allergies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: allergist (Thesaurus) allergic rhinitis allergy ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language