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Line breaks: ex|peri|ment
Pronunciation: /ɪkˈspɛrɪm(ə)nt
, ɛk-/

Definition of experiment in English:


1A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact: a laboratory which carried out experiments on pigs [mass noun]: I have tested this by experiment
More example sentences
  • Carry out tests or experiments on these deductions in order not to prove them but to refute them.
  • Interestingly enough, such individuals were also hostile to scientific experiments on animals as well.
  • Scientists run experiments on physical evidence and draw conclusions based on their results.
test, investigation, trial, enquiry, demonstration;
examination, observation;
assessment, evaluation, appraisal, inspection, analysis, scrutiny, study, probe;
research, experimentation, observation, trial and error, analysis, testing
1.1A course of action tentatively adopted without being sure of the outcome: the previous experiment in liberal democracy had ended in disaster
More example sentences
  • Starting the blog was an experiment in trying a few different ways to address the limitations of our political process.
  • He knew that our experiment in self-government could fail if he had a serious lapse of judgment.
  • This page is an experiment in interactivity which, as a journalist, I've found extremely exciting.


Pronunciation: /also ɪkˈspɛrɪmɛnt
[no object] Back to top  
1Perform a scientific procedure, especially in a laboratory, to determine something: experimenting on animals causes suffering
More example sentences
  • The primates being experimented on in laboratories share over 95 per cent of their DNA with you.
  • Cloning humans while the technology is still new and unproven is akin to experimenting on babies.
  • He then went on to say that since animals habitually injure each other we should not worry unduly about experimenting on them in a good cause.
conduct experiments, carry out trials/tests, conduct research;
test, trial, put to the test, do tests on, try out, carry out trials on, assess, appraise, evaluate;
investigate, examine, explore, observe, verify
1.1Try out new ideas or methods: the designers experimented with new ideas in lighting
More example sentences
  • We had also experimented with our running method today.
  • Some regions of China, looking for creative ways to improve local governance, have already experimented with the idea.
  • I also experimented with innovative methods of displaying my growing autograph collection.


Middle English: from Old French, or from Latin experimentum, from experiri 'try'. Compare with experience and expert.



Pronunciation: /-mɛnˈteɪʃ(ə)n/
Example sentences
  • All the above is utterly and completely without any scientific basis in either research or experimentation.
  • There has been limited manipulative experimentation performed to test any of the previous hypotheses.
  • If animal experimentation were stopped, the slowdown in medical research would be real and the cost would be high.


Example sentences
  • The first session was then initiated by the experimenter, who was situated in a separate control room.
  • This behavior did not change, even when the experimenter initiated recall in Greek.
  • Weissman said: ‘It is in the domain of the ethicists, not the experimenters, to figure out what our limits are.’

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