- to add something to something in order to improve it or make it more complete supplement something with something a diet supplemented with vitamin pills supplement something He supplements his income by giving private lessons.
- NAmE//ˌsʌpləmɛnˈteɪʃn//noun [uncountable]
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NAmE//ˈsʌpləˌmɛnt//Verb Forms present simple I / you / we / they supplement
he / she / it supplements
past simple supplemented
-ing form supplementing
supplementationjump to other results