2 definitions by johnhms

Top Definition
404 is an HTTP status code. When you visit a web page, your computer is requesting data from a server using Hypertext Transfer Protocol (HTTP).

Before the web page is displayed, your browser sends the web server its HTTP header. The server responds with its HTTP header, which contains the status code.

For a normal web page, the status is 200 (OK). You don't see this because the server just sends you the content of the page.

If you encounter an error, then you see the actual status code, such as 404 Not Found.

The first 4 indicates a client error. The server is saying that you've done something wrong, such as misspell the URL or request a page which is no longer there. (For comparison, a 5xx error indicates a server-side problem, which may be transient; if you try it again, it may work.)

The middle 0 refers to a general syntax error. This could indicate a spelling mistake.

The last 4 just indicates the specific error in the 40x group, which also includes 400: Bad Request, 401: Unauthorized, etc.
404 not found
by johnhms July 12, 2008

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Lotsa space for your liquids.

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In the early days of www, at CERN in Switzerland, the fault-tracing team was based in room 404. That's where the problems went to.
Error 404 page not found
by johnhms July 12, 2008

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt