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antibody Line breaks: anti|body
Pronunciation: /ˈantɪbɒdi/

Definition of antibody in English:

noun (plural antibodies)

A blood protein produced in response to and counteracting a specific antigen. Antibodies combine chemically with substances which the body recognizes as alien, such as bacteria, viruses, and foreign substances in the blood.
Example sentences
  • We can reduce levels of that substance by introducing into the body antibodies that specifically recognize it.
  • You have an immune response to the vaccine as your body develops antibodies to the virus.
  • An antibody is a protein which recognises a foreign molecule, known as an antigen.


Early 20th century: from anti- + body, translating German Antikörper, from anti- 'against' + Körper 'body'.

Definition of antibody in:
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