noun. ['ˌməltiːˈvaɪˌtəmən'] a pill or tablet containing several vitamins.
1. Noun, singular or mass Because of this, you may want to think twice about taking that multivitamin right before you head down to the gym to workout. 2. Adjective He may recommend a single supplement over a multivitamin — or no supplements at all. 3. Foreign word Do not take more than the recommended dosage of your multivitamin supplement. 4. Noun, plural Many multivitamin** and mineral supplements, as well as laxatives and antacids, contain magnesium.