[im-yuh-nahyz, ih-myoo-nahyz]

verb (used with object), im·mu·nized, im·mu·niz·ing.

to make immune.
to render harmless or ineffective; neutralize.
Law. to grant (a witness) immunity.

Also especially British, im·mu·nise.

Origin of immunize

First recorded in 1890–95; immune + -ize
Related formsim·mu·niz·er, nounhy·per·im·mu·nize, verb (used with object), hy·per·im·mu·nized, hy·per·im·mu·niz·ing.non·im·mu·nized, adjectiveo·ver·im·mu·nize, verb (used with object), o·ver·im·mu·nized, o·ver·im·mu·niz·ing.un·im·mu·nized, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for immunize

inoculate, protect, vaccinate

Examples from the Web for immunize

Contemporary Examples of immunize

  • Doctors in France, Germany and Holland have instead chosen to use information to immunize people against their fears.

    The Daily Beast logo
    Europe’s Hidden Ebola Cases

    Barbie Latza Nadeau

    October 15, 2014

  • It is as if by acting scandalously, they are able to immunize themselves.

    The Daily Beast logo
    Monsters vs. Weenies

    Lee Siegel

    December 29, 2009

Historical Examples of immunize

  • 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

British Dictionary definitions for immunize




to make immune, esp by inoculation
Derived Formsimmunization or immunisation, nounimmunizer or 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

Word Origin and History for immunize

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

Online Etymology Dictionary, © 2010 Douglas Harper

immunize in Medicine




To render immune.
To produce immunity in, as by inoculation.
Related formsim′mu•ni•zation (-nĭ-zāshən) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

immunize in Science



The process of inducing immunity to an infectious organism or agent in an individual or animal through vaccination.
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.
Related formsimmunize verb
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.