vaccination

noun

vac·​ci·​na·​tion ˌvak-sə-ˈnā-shən 

1

: the act of vaccinating

2

: the scar left by vaccinating

Examples of vaccination in a Sentence

Recent Examples on the Web

All 50 states require polio vaccination for school attendance. —Jon Lapook, CBS News, 22 Feb. 2026

That means that 3% of people can get measles even after vaccination. —Erika Edwards, NBC news, 21 Feb. 2026

This peak comes as vaccination rates among children continue to decline. —Ciara McCarthy, Fort Worth Star-Telegram, 20 Feb. 2026

That means a large number of school-age children skipped their vaccinations in the same year that the measles outbreak in West Texas claimed the lives of two children who were not vaccinated against the disease. —Lauren Mascarenhas, CNN Money, 19 Feb. 2026

Word History

Etymology

earlier, "inoculation with fluid from cowpox pustules," from vaccine "of cowpox" (in the phrases vaccine matter, vaccine virus) + -ation — more at vaccine

First Known Use

1891, in the meaning defined at sense 1

Phrases Containing vaccination

• anti-vaccination

Rhymes for vaccination

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

vaccination

noun

vac·​ci·​na·​tion ˌvak-sə-ˈnā-shən 

1

: the act of vaccinating

2

: the scar left by vaccinating

Medical Definition

vaccination

noun

vac·​ci·​na·​tion ˌvak-sə-ˈnā-shən 

1

: the introduction into humans or domestic animals of microorganisms that have previously been treated to make them harmless for the purpose of inducing the development of immunity

oral vaccination

vaccination against smallpox

vaccination for whooping cough

2

: the scar left by vaccinating