• A link, on Wikipedia, going to another Wikipedia page that doesn't exist. Such links are, by default, automatically coloured red by the software, hence the name.

• A page on Wikipedia that doesn't exist; links to it will be coloured red. Follows from the earlier definition.
That page doesn't lead anywhere; it's full of redlinks.

I wanted to read that Wikipedia article, but it was a redlink.
by Nihiltres October 26, 2009
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