[ im-yuh-nuh-zey-shuh n, ih-myoo- ]
/ ˌɪm yə nəˈzeɪ ʃən, ɪˌmyu- /


the fact or process of becoming immune, as against a disease.
Finance. a method of protection against fluctuating bond interest rates by investing in securities having different yields and terms.


Nearby words

  1. immune system,
  2. immune thrombocytopenic purpura,
  3. immunifacient,
  4. immunity,
  5. immunity bath,
  6. immunize,
  7. immuno-,
  8. immunoadjuvant,
  9. immunoadsorbent,
  10. immunoassay

Origin of immunization

First recorded in 1890–95; immunize + -ation

Related formshy·per·im·mu·ni·za·tion, nounnon·im·mu·ni·za·tion, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for immunization

Word Origin and History for immunization



1893, from immunize + -ation.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for immunization


[ ĭm′yə-nĭ-zāshən ]

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.

Culture definitions for immunization


The process of inducing immunity, usually through inoculation or vaccination.


Frequently, schoolchildren are required by state law to be immunized against certain diseases. Because of such widespread immunization, many diseases that used to be fairly common, including smallpox, tetanus, and whooping cough, have become rare.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.