vaccination

UK: /ˌvæksɪˈneɪʃ^ən/ US: /ˌvæksəˈneɪʃən/ ,(vak′sə nā′shən)

WordReference Random House Unabridged Dictionary of American English © 2025

vac•ci•na•tion  (vak′sə nā′shən), n. [Med.]

1. Immunology the act or practice of vaccinating;
   inoculation with vaccine.

• vaccine (adjective, adjectival) + -ation 1800–10

Collins Concise English Dictionary © HarperCollins Publishers::

vaccination / ˌvæksɪˈneɪʃən/ noun

1. the act of vaccinating
2. the scar left following inoculation with a vaccine

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