Definition of supplement in English:

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Pronunciation: /ˈsəpləmənt/
1Something that completes or enhances something else when added to it: the handout is a supplement to the official manual
More example sentences
  • On the other hand, the Accelerando Series is a useful supplement to piano instruction for the elementary pianist of any age.
  • All art, all education, can be merely a supplement to nature.
  • The existing commentary works as a supplement to the movie without necessarily shedding new light on it.
addition, accessory, supplementation, supplementary, extra, add-on, adjunct, appendage;
Computing  peripheral
1.1A substance taken to remedy the deficiencies in a person’s diet: multivitamin supplements
More example sentences
  • The selling of the plethora of diet pills, supplements and herbal remedies is only one part of a broader, troubling picture.
  • He said using more dairy products, such as whey, as food ingredients and nutritional supplements, looks very promising, and he gave a detailed overview of the potential market.
  • It is already used as a food supplement and as an ingredient in adhesives, finishing materials for paper and textiles, paints, and other nonfood products.
1.2A separate section, especially a color magazine, added to a newspaper or periodical.
Example sentences
  • Reports on the activities of these schools appeared in women's magazines or as part of Sunday newspaper supplements.
  • We supported these in-person information sessions with new brochures, print ads, and newspaper supplements.
  • The advertisements in the glossy weekend newspaper supplements are an attempt to dictate wants.
pullout, insert, extra section
2 Geometry The amount by which an angle is less than 180°.


Pronunciation: /ˈsəpləˌment/
Pronunciation: /ˈsəpləmənt/
[with object]
Add an extra element or amount to: she took the job to supplement her husband’s income
More example sentences
  • The interview was supplemented with several rounds of scotch.
  • But the point that many museums are devoted to or supplementing their holdings with popular arts is exciting because it opens a window on unique ideas for audiences who might not have known them before.
  • His deft critique of the British media scene is supplemented by useful points of comparison with the situation in America, France, Italy and Sweden.
augment, increase, add to, boost, swell, amplify, enlarge, top up



Pronunciation: /ˌsəpləˈmentl-ē/
Example sentences
  • I'm very concerned about people taking hormones supplementally, unless there's very good reason to do that.
  • They observed that parents of supplementally fed puffin chicks compensated for the extra food by making less-frequent food deliveries.
  • He also believes that antioxidants taken supplementally will combat the negative effects of exercise by protecting cells and tissues against destructive free radicals.


Late Middle English: from Latin supplementum, from supplere 'fill up, complete' (see supply1).

For editors and proofreaders

Syllabification: sup·ple·ment

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