English Reference
adjective · noun

immune

adj. · n.
US /ˌɪmˈjun/ UK /ɪmjˈuːn/ im·mune UK spelling immunes

  1. 01 B2 Upper Intermediate Medicine

    adj.protected from a specific disease because your body has already fought it or you had a vaccine.

    adj.possessing a specific biological resistance to a pathogen, typically through prior exposure or vaccination.

    Simple

    Most people are now immune to the virus thanks to the successful vaccination program.

    In context

    The researchers discovered that a small percentage of the population was naturally immune to the strain due to a rare genetic mutation.

    Usage

    Usually followed by the preposition 'to'.

    Pitfall
    He is immune from the flu. He is immune to the flu.

    When talking about diseases or physical effects, use the preposition 'to'.

  2. 02 C1 Advanced Formal Law

    adj.not affected by a rule, tax, or punishment that other people have to deal with.

    adj.exempt from a duty, legal obligation, or the effects of a particular law or authority.

    Simple

    Diplomats are often immune from local laws while they are working in a foreign country.

    In context

    The former head of state argued that he was immune from prosecution for actions taken during his time in office.

    Usage

    Often followed by the preposition 'from' in legal contexts.

  3. 03 B2 Upper Intermediate

    adj.not influenced or hurt by something like criticism or bad weather.

    adj.not susceptible to or affected by a particular influence, emotion, or external pressure.

    Simple

    After years in politics, she became immune to the harsh comments in the newspapers.

    In context

    No company is entirely immune to the fluctuations of the global economy, regardless of its size or previous success.

  4. 04 C2 Proficiency Technical Medicine

    n.a person who cannot catch a certain disease.

    n.an individual who is not susceptible to a specific infection or disease.

    Simple

    The scientists studied the immunes to understand how their bodies resisted the infection.

    In context

    The study focused on the long-term antibody levels of the immunes compared to those who had recently recovered from the illness.

Usage immune system · immune response · immune cells

If outside immune cells could enter the brain in some people, perhaps the process was not rare at all.

ScienceDaily· 14 Aug 2026

Second, the immune response tends to be highly specific, meaning it may recognize only the exact drug used in the vaccine.

ScienceDaily· 13 Jun 2026

From Middle English, from Middle French immun, from Latin immūnis (“exempt from public service”), from in- (“not”) + mūnus (“service”).

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

This entry
Origin Latin immūnis
Level B2 · Upper Intermediate
Frequency Common
Updated