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[im-yuh-nahyz, ih-myoo-nahyz] /ˈɪm yəˌnaɪz, ɪˈmyu naɪz/
verb (used with object), immunized, immunizing.
to make immune.
to render harmless or ineffective; neutralize.
Law. to grant (a witness) immunity.
Also, especially British, immunise.
Origin of immunize
First recorded in 1890-95; immune + -ize
Related forms
immunizer, noun
hyperimmunize, verb (used with object), hyperimmunized, hyperimmunizing.
nonimmunized, adjective
overimmunize, verb (used with object), overimmunized, overimmunizing.
unimmunized, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for immunize
Contemporary Examples
Historical Examples
  • His immunity to the sickness of his culture could not immunize the entire populace.

    The Great Gray Plague Raymond F. Jones
  • Or at least a way to immunize the ones that aren't infected yet.

    Star Surgeon Alan Nourse
  • "If it works with these cases, it will be simple to immunize the whole population," Tiger said.

    Star Surgeon Alan Nourse
  • Attempts to immunize small animals with Amanita toxin succeed only to a limited degree.

    Food Poisoning Edwin Oakes Jordan
  • The only proof that we can immunize against hay fever is to immunize against hay fever.

    The Treatment of Hay Fever George Frederick Laidlaw
  • A general social re-organization is needed which will redistribute forces, immunize, divert and nullify.

  • He'd spent time in Medico-Synthesis after every major job to immunize him against interrogation.

    Evil Out of Onzar Mark Ganes
  • Would you advise their use as a preventive measure, to immunize the workers in the industries?

British Dictionary definitions for immunize


to make immune, esp by inoculation
Derived Forms
immunization, immunisation, noun
immunizer, immuniser, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for immunize

1889, from immune + -ize. Related: Immunized; immunizing.

Online Etymology Dictionary, © 2010 Douglas Harper
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immunize in Medicine

immunize im·mu·nize (ĭm'yə-nīz')
v. im·mu·nized, im·mu·niz·ing, im·mu·niz·es

  1. To render immune.

  2. To produce immunity in, as by inoculation.

im'mu·ni·za'tion (-nĭ-zā'shən) n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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immunize in Science
  1. The process of inducing immunity to an infectious organism or agent in an individual or animal through vaccination.

  2. A vaccination that induces immunity. A recommended schedule of immunizations for infants and young children includes vaccines against diphtheria, polio, tetanus, measles, mumps, and rubella.

immunize verb
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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