Dictionary definition · supplement
noun
- textual matter that is added onto a publication; usually at the end
- a quantity added (e.g. to make up for a deficiency)
- a supplementary component that improves capability
verb
- add as a supplement to what seems insufficient"supplement your diet"
- serve as a supplement to"Vitamins supplemented his meager diet"
- add to the very end"He appended a glossary to his novel where he used an invented language"
Source: Open English WordNet (CC BY 4.0).