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Definition of tester noun from the Oxford Advanced Learner's Dictionary

tester

noun

/ˈtestə(r)/

/ˈtestər/

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a person or thing that tests something
- testers of new software
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a small container of a product, such as perfume, that you can try in a shop to see if you like itTopics Shoppingc2

See tester in the Oxford Advanced American Dictionary

Check pronunciation: tester

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noun

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