English Reference
noun · adjective

participant

n. · adj.
US /pɑɹˈtɪsəpənt/ UK /pɑːtˈɪsɪpənt/ par·tic·i·pant UK spelling participant's, participant's

  1. 01 B1 Intermediate

    n.a person who joins in an activity or event.

    n.an individual who takes part in a specific activity, event, or social interaction.

    Simple

    Each participant in the workshop received a certificate at the end of the day.

    In context

    The study required every participant to maintain a detailed log of their dietary habits over a six-month period.

  2. 02 B2 Upper Intermediate Academic Medicine

    n.a person who is part of a medical test or a scientific study.

    n.an individual enrolled in a clinical trial or research project.

    Simple

    The doctor explained the risks to every participant before the medical trial began.

    In context

    Researchers noted that several participants withdrew from the clinical trial due to unforeseen side effects during the second phase.

  3. 03 C1 Advanced Formal

    adj.describing someone or something that is sharing in an action.

    adj.sharing in or having a part of something; often used in formal or legal contexts to describe involvement.

    Simple

    The participant nations agreed to the new trade rules.

    In context

    The participant observers remained within the community for a year to document social changes from an internal perspective.

    Usage

    Usually placed before the noun it modifies.

    non participating

Usage participant observation

Yuval Raphael's song, New Day Will Rise, placed 15th with the contest's juries - but outperformed every other participant in the public vote, scoring 297 points.

BBC News· 14 Aug 2026

These images feel so natural in part because McEvoy was not a voyeur but a participant in London’s mid-90s nightlife.

The Guardian· 13 Aug 2026

Borrowed from Middle French participant, from Latin participāns, present participle of participō; see participate. Displaced native Old English dǣlnimend (literally “part taker”).

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

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