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

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


  1. to make immune, esp by inoculation

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

  1. To render immune.
  2. To produce immunity in, as by inoculation.

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