checkercheck·er /ˈtʃekə-ər/ noun [countableC]1COMPUTING spell/ spelling/grammar checker a computer program that checks spelling or grammaran automatic grammar checker that searches for missing words, bad punctuation etc
2JOBMANUFACTURINGsomeone whose job is to check that things are correct or done correctlyour quality control checker
3American EnglishAmE someone who works in a SUPERMARKET, adding up the cost of the goods people buy