There are 2 definitions of checker in English:

checker1

Line breaks: check¦er
Pronunciation: /ˈtʃɛkə
 
/

noun

1A person or thing that verifies or examines something: a spelling and grammar checker
More example sentences
  • Have you ever wondered why the grammar checker in your word processor is so terrible?
  • Even the grammar checker on my computer has a problem with that one.
  • Ultimately, what is wanted is a computer routine similar to the grammar checker which would be programmed to highlight words and phrases which were likely to be misunderstood at the receiving end.
2US A cashier in a supermarket.
More example sentences
  • At a recent trip to the supermarket the checker accidentally failed to me charge for some items.
  • The checker in Aisle 4 at the supermarket stared at me.
  • I had quite a bit more sympathy for Brendan, the hapless teenaged supermarket checker, than did the author of the book.

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Word of the day middlescent
Pronunciation: ˌmidlˈesənt
adjective
middle-aged, but still maintaining youthful interests and activities 

There are 2 definitions of checker in English:

checker2

Line breaks: check¦er
Pronunciation: /ˈtʃɛkə
 
/

noun & verb

US spelling of chequer.

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