1. makes immune or resistant to a particular infection or toxin by inoculation
Usage: British spelling; third person singular present tense
2. makes someone or something immune to or unaffected by something
Usage: British spelling; third person singular present tense; figurative use

Examples

• The doctor immunises children against measles with a vaccine.
• This vaccination programme immunises the population against flu.
• The new treatment immunises patients from the side effects.
• Regular exposure to criticism immunises her against harsh reviews.
• The coating immunises the metal surface from corrosion.
• Experience immunises him against making the same mistakes.