antibody
noun
an·ti·body
ˈan-ti-ˌbä-dē 
: any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains
called also immunoglobulin
Examples of antibody in a Sentence
Recent Examples on the Web
Data from one antibody drug conjugate from Merck and partner Kelun is also being presented this weekend at the ASCO meeting.
—
Angelica Peebles, CNBC, 31 May 2026
Pfizer presented data showing an XFG vaccine and the current formulation produced similar antibody levels.
—Berkeley Lovelace Jr, NBC news, 28 May 2026
Dawicki says it’s diagnosed by looking at a patient’s history, doing a physical exam and running a blood test to check for antibodies.
—Helen Carefoot, Flow Space, 27 May 2026
The same qualities that make banks stable—risk control, governance, structured decision-making—become antibodies against sustained transformation.
—Alex Kreger, Forbes.com, 27 May 2026
See All Example Sentences for antibody
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Angelica Peebles, CNBC, 31 May 2026
Pfizer presented data showing an XFG vaccine and the current formulation produced similar antibody levels.
—Berkeley Lovelace Jr, NBC news, 28 May 2026
Dawicki says it’s diagnosed by looking at a patient’s history, doing a physical exam and running a blood test to check for antibodies.
—Helen Carefoot, Flow Space, 27 May 2026
The same qualities that make banks stable—risk control, governance, structured decision-making—become antibodies against sustained transformation.
—Alex Kreger, Forbes.com, 27 May 2026
See All Example Sentences for antibody
Cite this Entry
“Antibody.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antibody. Accessed 4 Jun. 2026.
Copy CitationKids Definition
antibody
noun
an·ti·body
ˈant-i-ˌbäd-ē
: a substance produced by special cells of the body that combines with an antigen and counteracts its effects or those of the microscopic plant or animal on which the antigen may occur
Medical Definition
antibody
noun
an·ti·body
ˈant-i-ˌbäd-ē
plural antibodies
: any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains
called also immunoglobulin
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