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The brief moment when a web page shows text in a fallback font before the intended web font finishes loading and swaps in, causing a visible change in the type.

The ordered list of fonts a website tells the browser to use, from the preferred one down to safe fallbacks. If the first font isn't available, the browser tries the next.

A technique that limits a block of text to a set number of lines and hides the rest, usually adding an ellipsis, so items like cards stay the same height.

The width of a block of text, judged by how many characters fit on one line. A comfortable measure (often around 45–75 characters) keeps reading easy; lines that are too wide or too narrow tire the eye.

A font in which every character takes up the same horizontal space, so letters and numbers line up vertically. It's the classic look of code editors and terminals.

A number style where every digit takes up the same width, so figures line up neatly in columns and don't shift sideways as the values change.

A single font file that can smoothly adjust qualities like weight, width, or slant, instead of needing a separate file for each style. This lets an interface offer many text looks while downloading less.