I. sup ‧ ple ‧ ment 1 AC /ˈsʌpləmənt, ˈsʌplɪmənt/ BrE AmE noun [countable]
[ Word Family: noun : ↑ supplement , ↑ supplementation ; verb : ↑ supplement ; adjective : ↑ supplementary ]
[ Date: 1300-1400 ; Language: Latin ; Origin: supplementum , from supplere ; ⇨ ↑ supply 2 ]
1 . something that you add to something else to improve it or make it complete:
vitamins and other dietary supplements
supplement to
The payments are a supplement to his usual salary.
2 . an additional part at the end of a book, or a separate part of a newspaper, magazine etc:
the Sunday supplements
3 . an amount of money that is added to the price of a service, hotel room etc:
Single rooms are available at a supplement.
II. sup ‧ ple ‧ ment 2 AC /ˈsʌpləment, ˈsʌplɪment/ BrE AmE verb [transitive]
[ Word Family: noun : ↑ supplement , ↑ supplementation ; verb : ↑ supplement ; adjective : ↑ supplementary ]
to add something, especially to what you earn or eat, in order to increase it to an acceptable level
supplement something by/with something
Kia supplements her regular salary by tutoring in the evenings.
—supplementation /ˌsʌpləmenˈteɪʃ ə n, ˌsʌplɪmenˈteɪʃ ə n/ noun [uncountable]