Definitions

1. noun

A preparation of killed or inactivated microorganisms, such as bacteria or viruses, or of proteins or toxins derived from them, used to stimulate the body’s immune system to produce immunity to a particular disease.

“The doctor recommended that the child get vaccinated against measles and chickenpox before starting school.”

2. noun

A substance that induces immunity to a disease, especially one that is produced by genetic engineering or by the use of a weakened form of a virus.

“The researchers developed a new vaccine to combat the emerging pandemic.”

3. verb

To inoculate (someone or something) with a vaccine.

“The nurse vaccinated the baby against several diseases during the doctor’s visit.”

4. verb

To make (someone or something) immune to a disease, especially by means of a vaccine.

“The new vaccine will help to vaccinate millions of people worldwide.”