Definitions

1. adjective

having or providing resistance to infection, disease, or a specific substance

“The vaccine made the child immune to measles.”

2. verb

to make someone or something resistant to infection, disease, or a specific substance

“The antibiotics were given to the patient to immunize her against future infections.”

3. noun

a substance or agent that provides immunity or resistance

“The immunoglobulin was administered to the patient to boost their immune system.”