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Definition of immunization

immunization

/ˌɪm.jə.nəˈzeɪ.ʃən/
(UK: immunisation)
im · mu · ni · za · tion

Plural:immunizations
•
Adjective:immunized
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immunization Lexical Profile

immunization Game Scores & Validity

• noun

1

The action or process of making a person or animal resistant to an infectious disease, typically by the administration of a vaccine.

Example

"Widespread childhood immunization has dramatically reduced the incidence of measles and polio worldwide."


2

In finance, an investment strategy that matches the duration of assets and liabilities to protect a portfolio's net worth against fluctuations in interest rates.

Example

"The pension fund manager used portfolio immunization to ensure that future payouts would not be jeopardized by falling interest rates."

Synonyms
View all synonyms for immunization

Word Nuance & Usage

While often used interchangeably in everyday speech, 'vaccination' refers specifically to the physical administration of a vaccine, whereas 'immunization' refers to the physiological process of becoming resistant to a disease after the vaccine takes effect.

• Rhymes for immunization

Word Origin & Etymology

Formed in the late 19th century from the verb 'immunize', which traces back to the Latin word 'immunis' ('exempt from public service or taxation'), combining 'in-' ('not') and 'munis' ('performing services').

Cite this Entry


Wordmom. (2026). Definition of Immunization. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/immunization
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