noun A person whose job is to check that a product or system works correctly.
- She works as a software tester, hunting for bugs before release.
- The game company hired a tester to play the new level again and again.
- As a tester, Maria writes down every error she finds in the app.
noun A small sample of a product, such as perfume or makeup, that customers can try before buying.
- He sprayed a tester of the new cologne on his wrist.
- She tried the lipstick tester on the back of her hand before buying it.
- The store keeps a tester of each lotion on the shelf so shoppers can smell it.
noun A device used to check whether something is working properly.
- Use a voltage tester before touching any wiring.
- Dad used a battery tester to see whether the old batteries still had power.
- A small tester showed that the outlet was working correctly.
noun A canopy suspended over a bed or pulpit.
- The four-poster bed had an ornate tester overhead.
- Silk curtains hung from the wooden tester above the old bed.
- The museum guide pointed to the carved tester over the historic bed.
