Meaning of CHECKER in English

CHECKER

/ ˈtʃekə(r); NAmE / noun

—see also checkers

1.

( especially US ) a person who works at the checkout in a supermarket

2.

(in compounds) a computer program that you use to check sth, for example the spelling and grammar of sth you have written :

a spelling / grammar / virus checker

3.

a person who checks things :

a quality control checker

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.