English Reference
noun

organ

n.
US /ˈɔɹɡən/ UK /ˈɔːɡən/ or·gan UK spelling organ's, organ's, organing

  1. 01 B1 Intermediate Medicine

    a part of your body that has a specific job, like your heart, lungs, or brain.

    a distinct part of an organism that performs a specific vital function, such as the heart or liver.

    Simple

    The heart is the organ responsible for pumping blood around your body.

    In context

    The surgeon explained that the patient required an urgent transplant because the vital organ was no longer functioning correctly.

  2. 02 B1 Intermediate Music

    a large musical instrument with a keyboard and many pipes that make sound using air.

    a large musical instrument consisting of pipes supplied with air from a bellows and played from a keyboard.

    Simple

    The music from the church organ filled the entire building.

    In context

    The cathedral's pipe organ is famous for its intricate woodwork and the powerful, resonant bass notes it produces during recitals.

  3. 03 C1 Advanced Formal

    a magazine or newspaper that gives the official news and opinions of a group or party.

    a periodical or publication that serves as the official voice of a specific organization or political party.

    Simple

    The journal serves as the official organ of the medical association.

    In context

    For decades, the newspaper functioned as the primary organ of the ruling party, disseminating official policy to the public.

  4. 04 C1 Advanced FormalAcademic Law

    a department or part of a government that does a specific job.

    an administrative or judicial subdivision of a government or international organization.

    Simple

    The United Nations has several different organs to handle world issues.

    In context

    The treaty established a new judicial organ to resolve trade disputes between the member states without resorting to sanctions.

  5. 05 C2 Proficiency SlangFormal Medicine

    a word sometimes used for the male sex organ.

    a reference to the penis, often used in medical or euphemistic contexts.

    Simple

    The doctor used formal language to describe the male reproductive organ.

    In context

    In the Victorian era, writers often used the term 'organ' as a polite euphemism to avoid more direct anatomical language.

Usage reproductive organ

However, different organs can age at different speeds.

ScienceDaily· 24 Aug 2026

NHS Blood and Transplant's medical director says waiting lists for organ operations are unfair but leaders are not solving the issue.

BBC News· 13 Aug 2026

From Middle English organe, from Old French organe, from Latin organum, from Ancient Greek ὄργανον (órganon, “an instrument, implement, tool, also an organ of sense or apprehension, an organ of the body, also a musical instrument, an organ”), from Proto-Indo-European *werǵ-. Doublet of organon, organum, and orgue.

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

This entry
Origin ine-pro *werǵ-
Level B2 · Upper Intermediate
Frequency Common
Updated