1sup·ple·ment 
/ˈsʌpləmənt/ noun
plural sup·ple·ments /ˈsʌpləmənt/ noun [count] 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 Brit : an amount of money that must be paid in addition to the regular price
▪ First-class accommodation is available for a supplement.
▪ dietary/vitamin supplements
▪ an advertising/literary supplement ▪ the supplement to the encyclopedia
▪ First-class accommodation is available for a supplement.
