A hyperlink is a link you can click on or activate with the keyboard or other device in order to go somewhere else. A hyperlink is defined by its function, not by its appearance. What it looks or sounds or smells like is completely irrelevant except as a way of recognizing it. Visually impaired people follow hyperlinks with speech-based browsers and never see text at all. A hyperlink without a blue underline is still a hyperlink if your browser allows you to click on it or otherwise activate it to go somewhere else on the World Wide Web, or in another hypertext system.
See also the URL entry.
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