vaccinated

From the verb vaccinate: (⇒ conjugate)

vaccinated is: ⓘ

v past

v past p

WordReference Random House Learner's Dictionary of American English © 2025

vac•ci•nate /ˈvæksəˌneɪt/   v., -nat•ed, -nat•ing. 

1. Immunology to inoculate with a vaccine.

vac•ci•na•tion /ˌvæksəˈneɪʃən/  n. 

[uncountable] the importance of vaccination against disease.

[countable] performed thousands of vaccinations.

WordReference Random House Unabridged Dictionary of American English © 2025

vac•ci•nate  (vak′sə nāt′), v., -nat•ed, -nat•ing. [Med.]
v.t. 

1. to inoculate with the vaccine of cowpox so as to render the subject immune to smallpox.
2. Immunology to inoculate with the modified virus of any of various other diseases, as a preventive measure.

v.i. 

3. Immunology to perform or practice vaccination.

• back formation from vaccination 1800–10

Collins Concise English Dictionary © HarperCollins Publishers::

vaccinate / ˈvæksɪˌneɪt/ verb

1. to inoculate (a person) with a vaccine so as to produce immunity against a specific disease

ˈvacciˌnator noun