supplement /ˈsʌpləmənt/ noun [count]
plural : supplements
1 : something that is added to something else in order to make it complete • dietary/vitamin supplements
2 : an extra part that is added to a book or newspaper • an advertising/literary supplement • the supplement to the encyclopedia
3 British : an amount of money that must be paid in addition to the regular price • First-class accommodation is available for a supplement.
Learn about supplement as a verb.
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