The term 'PROOFER'S CATCH' refers to a typographical error that is caught by a proofreader. It is an error that was not noticed by the author or editor, but is spotted by the proofreader during the proofreading process. This type of error can range from a misspelled word to a misplaced punctuation mark. The job of a proofreader is to catch these errors and make sure that the final product is free of any mistakes.