Typography Glossary
Clear, plain-English definitions of the type and font terms you'll meet while choosing, pairing, and using fonts — from kerning and x-height to ligatures.
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Baseline
The baseline is the invisible line on which letters sit. Most characters rest on it, while round letters like "o" dip slightly below it and descenders like "g" and "y" hang beneath. The baseline is the primary reference for aligning text, measuring leading, and setting type on a grid.
Blackletter
Blackletter is a dense, ornate script style based on the manuscript hands of medieval Europe. Also called Gothic or Old English, it features dramatic stroke contrast and angular, fractured letterforms. Today it signals tradition, heavy metal, tattoo culture, and certificate or newspaper-masthead design.
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Cap Height
Cap height is the height of a typeface's uppercase letters, measured from the baseline to the top of a flat capital like "H" or "E." It is usually shorter than the ascender height. Cap height matters when aligning capital letters with logos, icons, or other capitals across a layout.
Character Set
A font's character set is the full collection of glyphs it contains — letters, numbers, punctuation, symbols, and accented or non-Latin characters. A larger character set supports more languages and richer typography. Before using a font for a specific language, check that its character set covers the needed letters.
Counter
A counter is the enclosed or partially enclosed white space inside a letter — the hole in an "o," "b," or "e," or the open space inside a "c" or "u." Counter size affects legibility: open, generous counters keep letters distinct and readable at small sizes.
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Descender
A descender is the part of a letter that drops below the baseline — the tails of "g," "j," "p," "q," and "y." The lowest point they reach is the descender line. Deep descenders look elegant but need more line spacing; shallow ones let lines sit closer together.
Display Font
A display font is designed to be used at large sizes — headlines, posters, logos, and titles — rather than for body text. Display faces prioritise personality and impact over readability in long passages, so they often have dramatic contrast, decorative details, or exaggerated proportions.
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Font
A font is a specific instance of a typeface — one weight, width, and style at a given size. "Arial Bold 14pt" is a font; "Arial" is the typeface. In digital design a font is also the file (TTF, OTF, WOFF2) that contains the character outlines your software renders.
Font Family
A font family is the complete set of related styles built from one typeface — regular, bold, italic, light, condensed, and so on. All members share the same core design but differ in weight, width, or slant, so they work together harmoniously in a single layout.
Font Pairing
Font pairing is the practice of combining two or more typefaces in one design so they complement each other. A reliable approach is to pair contrasting styles that share a mood — for example a bold display or serif for headings with a clean sans-serif for body text — creating clear hierarchy without clashing.
Font Weight
Font weight is the thickness of a typeface's strokes, from thin and light through regular and bold to black. Heavier weights draw attention and create hierarchy; lighter weights feel airy and refined. Weights are often numbered 100–900 in CSS, where 400 is regular and 700 is bold.
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Geometric (Sans-Serif)
A geometric sans-serif is built from simple geometric shapes — near-perfect circles, straight lines, and even strokes. The result looks clean, modern, and rational. Geometric faces are popular for branding and headlines but can tire the eye in long text because many letters share similar shapes.
Glyph
A glyph is a single visual representation of a character — the actual drawn shape of a letter, number, punctuation mark, or symbol in a font. One character can have several glyphs (for example, a standard "a" and a swash "a"), and a font's glyph count measures how complete it is.
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Leading (Line Spacing)
Leading (rhymes with "heading") is the vertical space between lines of text, measured baseline to baseline. The term comes from strips of lead inserted between lines of metal type. Generous leading makes paragraphs easier to read; too little crowds the lines and the eye loses its place.
Ligature
A ligature is a single glyph that combines two or more letters, designed so awkward collisions disappear. The classic example is "fi," where the dot of the "i" clashes with the hook of the "f." Standard ligatures improve readability; decorative ones add flourish to scripts and display type.
Lowercase
Lowercase letters are the small letters — a, b, c — used for most text. Their varied heights, with ascenders and descenders, create distinctive word shapes that make reading fast and comfortable. The name comes from the lower case where printers kept these more frequently used letters.
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Sans-Serif
A sans-serif typeface has no serifs — the strokes end cleanly without feet. "Sans" is French for "without." These faces look modern, clean, and minimal, and they render crisply on screens at small sizes, which makes them the default for user interfaces and digital body text.
Script Font
A script font imitates handwriting or calligraphy, with letters that often connect in flowing strokes. Scripts range from formal copperplate to casual brush lettering. They add warmth and personality, which is why they suit wedding invitations, logos, greeting cards, and Cricut craft projects.
Serif
A serif is the small line or foot attached to the end of a letter's stroke. By extension, a serif typeface is one whose letters carry these finishing strokes. Serifs guide the eye along lines of text, which is why serif faces like Times and Garamond are traditional for long-form reading.
Slab Serif
A slab serif is a typeface whose serifs are thick, block-like, and roughly the same weight as the main strokes. Also called Egyptian or mechanistic, slab serifs feel bold, sturdy, and confident, which makes them popular for headlines, posters, logos, and branding that needs impact.
Small Caps
Small caps are uppercase letterforms drawn at roughly the height of lowercase letters. True small caps are designed with matching stroke weight, not just shrunken capitals. They let you emphasise words — abbreviations, names, or opening phrases — without the jarring size jump of full capitals.
Stem
A stem is the main vertical or diagonal stroke of a letter — the upright of an "l," the two diagonals of a "V," the spine of an "H." Stem thickness, and how it contrasts with thinner strokes, is a defining feature of a typeface's weight and style.
Stylistic Alternates
Stylistic alternates are optional substitute glyphs that give a letter a different look without changing its meaning — a looped "l," a single-storey "a," or a fancier "R." Fonts group them into stylistic sets you can toggle, letting one typeface offer several distinct moods from the same characters.
Swash
A swash is an extended, decorative flourish on a letter — usually a flowing extension of a stroke, terminal, or tail. Swashes appear most on capitals and on the first or last letters of a word. They add elegance and movement, which makes them popular in scripts, logos, and wedding typography.
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Terminal
A terminal is the end of a stroke that does not finish in a serif — the tip of the arm on an "f" or the tail of a "y." Terminals can be flat, rounded (ball terminals), tapered, or sheared. Their shape is a subtle but powerful clue to a typeface's personality.
Tracking (Letter-Spacing)
Tracking is the uniform amount of space added or removed between all letters in a run of text, also called letter-spacing. Unlike kerning, which targets individual pairs, tracking adjusts spacing evenly. Loosening tracking on uppercase headings improves legibility; tightening it can make text feel denser.
Typeface
A typeface is the design of a set of characters — the shapes of the letters, numbers, and symbols — sharing a consistent visual style. Helvetica and Garamond are typefaces. A typeface is the design; a font is one specific size, weight, or style of that design.
Typography
Typography is the art and craft of arranging type to make written language legible, readable, and visually appealing. It covers choosing typefaces, setting size, spacing, and line length, and shaping hierarchy. Good typography is largely invisible — it lets readers absorb content without friction.
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