/ Dictionary / Index C compendium: Meaning and Definition of Find definitions for: com•pen•di•um Pronunciation: (kum-pen'dē-um), [key] — pl. -di•ums, -di•a a brief treatment or account of a subject, esp. an extensive subject; concise treatise: a compendium of medicine. a summary, epitome, or abridgment. a full list or inventory: a compendium of their complaints. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: compendium (Thesaurus) compendious compensable Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language