Definition of 404 in English:

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An error message displayed by a browser indicating that an Internet address cannot be found.
Example sentences
  • We've been checking the contents of the URLs over the weekend:they were all showing 404 until last night, when two of the URLs become active.
  • Let's solve this, or at least be friendly to your users and help them get back on track whenever they hit a 404.

For editors and proofreaders

Syllabification: 404

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