Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “vaccine”

vaccine

noun [C]  /ˈvæk·sin, vækˈsin/ us  
a special substance that you take into your body to prevent a disease, and that contains a weakened or dead form of the disease-causing organism
vaccinate
verb [T]  /ˈvæk·səˌneɪt/ us  
Our children have been vaccinated for measles and other childhood diseases.
vaccination
noun [C]  /ˌvæk·səˈneɪ·ʃən/ us  
Most states require all children to receive the vaccination before beginning elementary school.
(Definition of vaccine from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of vaccine?
Add Cambridge dictionaries to your browser to your website

Definitions of “vaccine” in other dictionaries

Word of the Day

look on the bright side

to find good things in a bad situation

Word of the Day

The language of work

by Kate Woodford,
October 15, 2014
Most of us talk about our jobs. We tell our family and friends interesting or funny things that have happened in the workplace (=room where we do our job), we describe – and sometimes complain about – our bosses and colleagues and when we meet someone for the first time, we tell

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More