noun
A person who checks whether something works correctly or meets a standard.
She works as a software tester.
The testers found a problem in the app.
Common phrases & grammar
software tester
work as a tester
a tester for + noun
American English
How to pronounce tester
nounB1
TEHSter
/ˈtʰɛs.tɚ/
2 syllables · Stress the first syllable.
A person who checks whether something works correctly or meets a standard.
Practice out loudMeanings & examples
noun
A tool or machine used to check something, especially whether it works correctly.
Use a battery tester to check the battery.
The mechanic used a voltage tester.
Common phrases & grammar
battery tester · voltage tester
use a tester to + verb
a tester for + noun
noun
A product placed in a store so customers can try it before buying it, especially perfume or makeup.
You can try the perfume tester here.
The makeup tester is on the counter.
Good to know
A tester is usually a product kept in a store for trying, not a small sample to take home.
Common phrases & grammar
perfume tester
try a tester before + -ing
Useful expressions
A person who tries a new product before it is released to the public.
She was a beta tester for the new app.