- something added, esp. to make up for a lack or deficiency
- a section added to a book or the like to give additional information, correct errors in the body of the work, etc.
- a separate section containing feature stories, comic strips, or the like, issued with a newspaper
- the amount to be added to a given angle or arc to make 180° or a semicircle
Origin of supplementMiddle English from Classical Latin supplementum from supplere: see supply