tester
/ˈtɛstər/
noun
- A person or thing that tests something, such as a product, system, or idea.
- Before launching the game, the company hired a team of testers to play it.
- The software tester found several bugs in the new app.
- The car's safety features were evaluated by a professional tester.
- A small sample of a product, especially a cosmetic or perfume, used to try before buying.
- She sprayed the tester of the new perfume on her wrist.
- The store had testers for all the lipstick shades so customers could try them.
- I always use the tester before buying a new foundation.
- A device or tool used to measure or check something, such as electrical current or battery power.
- A circuit tester can help you find a broken wire.
- He used a battery tester to see if the remote needed new batteries.
- The electrician checked the outlet with a voltage tester.