English Reference
adjective · noun

experimental

adj. · n.
US /ɪkˌspɛɹɪˈmɛntəɫ/ UK /ɛkspˌɛɹɪmˈɛntəl/ ex·per·i·men·tal

  1. 01 B2 Upper Intermediate Academic Science

    adj.relating to scientific tests or based on doing experiments.

    adj.pertaining to, derived from, or founded on the use of controlled experiments to test a hypothesis.

    Simple

    The scientists are still in the experimental stage of the new drug trial.

    In context

    The researchers published their experimental findings in a peer-reviewed journal, detailing the rigorous controls used during the double-blind study.

    Usage

    Often used to modify nouns like 'data', 'results', or 'phase'.

    empiricaltest based
  2. 02 B2 Upper Intermediate

    adj.using new methods or ideas that have not been proven yet.

    adj.serving as a trial or tentative procedure; not yet established or finalised.

    Simple

    The school is trying an experimental teaching method this year.

    In context

    The government launched an experimental universal basic income programme in three small municipalities to observe its impact on local employment rates.

  3. 03 C1 Advanced Academic

    adj.using very new or strange ideas in art, music, or writing.

    adj.referring to avant-garde or innovative techniques that depart from traditional forms.

    Simple

    I found the experimental jazz concert a bit difficult to listen to.

    In context

    The gallery specialises in experimental digital art that challenges the viewer's perception of physical space and time.

    avant gardeinnovativeradical
  4. 04 C2 Proficiency TechnicalFormal Science

    n.a person or thing that is being used in a scientific test.

    n.the subject or entity undergoing an experiment.

    Simple

    The researcher monitored each experimental throughout the six-week study.

    In context

    Ethical guidelines require that every experimental be fully informed of the potential risks before the clinical trial commences.

    Usage

    This noun use is rare outside of specific technical or academic contexts; 'subject' is more common.

Usage experimental vaccine · concurrent experimental · merit experimental

The songs of Spears are spliced with Swan Lake, and the show becomes less narrative and more experimental, which renders it abstract but also deepens its emotional power.

The Guardian· 13 Aug 2026

And yet what is the point of an experimental practice that is unwilling to take risks, or a maximalist novel that hesitates to cram in more ideas?

The Guardian· 13 Aug 2026

From experiment + -al.

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

This entry
Level C1 · Advanced
Frequency Common
Updated