tester
//ˈtɛstər//
Noun
testerSingular
testersPlural
1
A person who tests or evaluates something, especially software, products, or systems to check for quality or functionality.
The software tester found several bugs before the product launch.
2
A device or instrument used to test or measure something, such as electrical circuits or chemical properties.
I used a voltage tester to check if the wire was live.
3
A small sample of a product, especially cosmetics or perfume, provided for customers to try before purchasing.
I tried the perfume tester at the store before buying it.
Noun
testerSingular
testersPlural
1
A canopy over a bed, especially a four-poster bed.
The antique four-poster bed had a beautiful silk tester.