What does antioxidant mean?

Definitions for antioxidant
ˌæn tiˈɒk sɪ dənt, ˌæn taɪ-an·tiox·i·dant

This dictionary definitions page includes all the possible meanings, example usage and translations of the word antioxidant.

Princeton's WordNet

  1. antioxidantnoun

    substance that inhibits oxidation or inhibits reactions promoted by oxygen or peroxides


  1. antioxidantnoun

    Any substance that acts to slow or prevent the oxidation of another chemical.

  2. antioxidantnoun

    In nutrition, one of a group of vitamins that act against the effects of free radicals.

  3. antioxidantadjective

    Acting or having agents that act against oxidation.


  1. Antioxidant

    Antioxidants are compounds that inhibit oxidation (usually occurring as autoxidation), a chemical reaction that can produce free radicals. This can lead to polymerization and other chain reactions. They are frequently added to industrial products, such as fuels and lubricants, to prevent oxidation, and to foods to prevent spoilage, in particular the rancidification of oils and fats. In cells, antioxidants such as glutathione, mycothiol or bacillithiol, and enzyme systems like superoxide dismutase, can prevent damage from oxidative stress. The only dietary antioxidants are vitamins A, C, and E, but the term antioxidant has also been applied to numerous other dietary compounds that only have antioxidant properties in vitro, with little evidence for antioxidant properties in vivo. Dietary supplements marketed as antioxidants have not been shown to maintain health or prevent disease in humans.


  1. antioxidant

    An antioxidant is a substance that reduces damage due to oxygen, such as that caused by free radicals. These antioxidants can help prevent cell and tissue damage that could lead to diseases like cancer and heart disease. They are found in various foods, including fruits and vegetables, nuts, grains, and some meats, poultry, and fish.


  1. Antioxidant

    An antioxidant is a molecule that inhibits the oxidation of other molecules. Oxidation is a chemical reaction that transfers electrons or hydrogen from a substance to an oxidizing agent. Oxidation reactions can produce free radicals. In turn, these radicals can start chain reactions. When the chain reaction occurs in a cell, it can cause damage or death to the cell. Antioxidants terminate these chain reactions by removing free radical intermediates, and inhibit other oxidation reactions. They do this by being oxidized themselves, so antioxidants are often reducing agents such as thiols, ascorbic acid, or polyphenols. Although oxidation reactions are crucial for life, they can also be damaging; plants and animals maintain complex systems of multiple types of antioxidants, such as glutathione, vitamin C, vitamin A, and vitamin E as well as enzymes such as catalase, superoxide dismutase and various peroxidases. Insufficient levels of antioxidants, or inhibition of the antioxidant enzymes, cause oxidative stress and may damage or kill cells. As oxidative stress appears to be an important part of many human diseases, the use of antioxidants in pharmacology is intensively studied, particularly as treatments for stroke and neurodegenerative diseases. Moreover, oxidative stress is both the cause and the consequence of disease.

Matched Categories

How to pronounce antioxidant?

How to say antioxidant in sign language?


  1. Chaldean Numerology

    The numerical value of antioxidant in Chaldean Numerology is: 2

  2. Pythagorean Numerology

    The numerical value of antioxidant in Pythagorean Numerology is: 5

Examples of antioxidant in a Sentence

  1. Matcha Mylkbar co-owner Mark Filippelli:

    It is such a powerful antioxidant that one gram of it every day has a huge( health) benefit.

  2. Floyd Cardoz:

    Turmeric is the yellow coloring that you find in most curries, but what most people don’t know about turmeric is that it’s a great antioxidant, it’s got great anti-cancer properties.

  3. Hyon Choi:

    As a major natural antioxidant in the body, uric acid has been estimated to account for more than 50 percent of the antioxidant capacity of plasma, with these potentially neuro-protective properties, uric acid has been hypothesized to protect against oxidative stress, a prominent contributor to dopaminergic neuron degeneration in Parkinson's disease, which may also play an important role in the pathogenesis of Alzheimer’s disease.

  4. Lisa Drayer:

    I think the bottom line is that cinnamon is a perfect pantry staple, a pleasant spice that can add flavor to foods for minimal calories, with antioxidant properties that may give an edge to those looking to better control their blood sugar, but we need to see more research before we can make any solid health claims linking cinnamon to reduce risk of disease or improved health.

  5. Lisa Cimperman:

    Eggs, in general, are also good sources of B vitamin, thiamine is one example, and selenium, which is an antioxidant, and folate is a good vitamin, particularly for pregnant women.

Popularity rank by frequency of use


Translations for antioxidant

From our Multilingual Translation Dictionary

Get even more translations for antioxidant »


Find a translation for the antioxidant definition in other languages:

Select another language:

  • - Select -
  • 简体中文 (Chinese - Simplified)
  • 繁體中文 (Chinese - Traditional)
  • Español (Spanish)
  • Esperanto (Esperanto)
  • 日本語 (Japanese)
  • Português (Portuguese)
  • Deutsch (German)
  • العربية (Arabic)
  • Français (French)
  • Русский (Russian)
  • ಕನ್ನಡ (Kannada)
  • 한국어 (Korean)
  • עברית (Hebrew)
  • Gaeilge (Irish)
  • Українська (Ukrainian)
  • اردو (Urdu)
  • Magyar (Hungarian)
  • मानक हिन्दी (Hindi)
  • Indonesia (Indonesian)
  • Italiano (Italian)
  • தமிழ் (Tamil)
  • Türkçe (Turkish)
  • తెలుగు (Telugu)
  • ภาษาไทย (Thai)
  • Tiếng Việt (Vietnamese)
  • Čeština (Czech)
  • Polski (Polish)
  • Bahasa Indonesia (Indonesian)
  • Românește (Romanian)
  • Nederlands (Dutch)
  • Ελληνικά (Greek)
  • Latinum (Latin)
  • Svenska (Swedish)
  • Dansk (Danish)
  • Suomi (Finnish)
  • فارسی (Persian)
  • ייִדיש (Yiddish)
  • հայերեն (Armenian)
  • Norsk (Norwegian)
  • English (English)

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:


Use the citation below to add this definition to your bibliography:


"antioxidant." Definitions.net. STANDS4 LLC, 2024. Web. 18 Jun 2024. <https://www.definitions.net/definition/antioxidant>.

Discuss these antioxidant definitions with the community:


    Are we missing a good definition for antioxidant? Don't keep it to yourself...

    Image or illustration of


    Credit »

    Free, no signup required:

    Add to Chrome

    Get instant definitions for any word that hits you anywhere on the web!

    Free, no signup required:

    Add to Firefox

    Get instant definitions for any word that hits you anywhere on the web!

    Browse Definitions.net


    Are you a words master?

    remove completely from recognition or memory
    A abhor
    B embellish
    C efface
    D transpire

    Nearby & related entries:

    Alternative searches for antioxidant: