tester
/ˈtɛstə/noun
A sample of a product, such as perfume or makeup, that customers can try in a store before buying.
Example sentences
- “She sprayed a little perfume from the tester onto her wrist.”
- “The store keeps a tester of every lipstick near the mirror.”
- “Please do not take the tester home; it stays on the counter.”
Testers are usually open and marked 'tester' or 'not for sale'. In software, a tester is also a person whose job is to find bugs.