English Reference
noun

immunity

n.
US /ˌɪmˈjunəti/ UK /ɪmjˈuːnɪti/ im·mu·ni·ty UK spelling immunities, immunity's

  1. 01 B2 Upper Intermediate Medicine

    the ability of your body to protect itself from a specific disease or infection.

    the physiological state of being resistant to a specific pathogen or toxin, typically through the presence of antibodies or white blood cells.

    Simple

    The vaccine helps your body build immunity against the flu.

    In context

    Natural immunity acquired after an initial infection often provides more robust long-term protection than certain first-generation synthetic vaccines.

    Usage

    Often used with the preposition 'to' or 'against'.

  2. 02 C1 Advanced Formal Law

    special protection that means you cannot be punished or sued by the law.

    an exemption from a legal obligation, penalty, or the jurisdiction of a court.

    Simple

    The witness was granted immunity from prosecution in exchange for her testimony.

    In context

    Diplomatic immunity prevents foreign representatives from being prosecuted under the host country's laws, though this privilege can be waived by their home state.

    Usage

    Commonly appears in the phrase 'sovereign immunity' or 'diplomatic immunity'.

  3. 03 C1 Advanced Literary

    the state of not being affected by something, like criticism or a bad habit.

    the quality of being unaffected or influenced by something external, such as social pressure or criticism.

    Simple

    After years in politics, he had developed an immunity to public criticism.

    In context

    The CEO seemed to possess a strange immunity to the anxieties that plagued his subordinates during the merger.

    indifferenceinsensitivity

Trump’s lawyers argued that, since the hush-money case presented evidence from his first term as president, it falls under that immunity.

Al Jazeera· 29 Aug 2026

If it spreads to neighbouring places with lower immunity, it will be a disaster,” Nasidi added.

Al Jazeera· 24 Aug 2026

From Middle English immunite, from Old French immunité, from Latin immūnitās, in the legal sense; for the medical use see immunization. Equivalent to immune + -ity.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Latin immūnitās
Level B2 · Upper Intermediate
Frequency Frequent
Updated