What does breadth mean?
Breadth is a noun that primarily denotes the measurement of something from side to side — its width — as when describing a river, a room, or a plot of land. Beyond this physical sense, it carries an important figurative meaning: the wide scope or comprehensiveness of something non-material, such as knowledge, experience, vision, or a course of study. A person praised for the breadth of their interests has mastered many subjects rather than a single narrow specialty. The word tends toward formal and literary registers, appearing frequently in education, criticism, and professional evaluation. Its antonym is narrowness, and its most common companion in everyday speech is the phrase "the length and breadth of," describing coverage across an entire area. Derived from Old English roots shared with "broad," it remains a precise, useful term for expressing both physical dimension and intellectual expansiveness.
The distance or measurement from side to side of something; width.
"The hall runs the full breadth of the building."
In everyday measurement contexts, "width" is more common; "breadth" can sound formal or slightly elevated.
Wide scope, range, or comprehensiveness, especially of knowledge, experience, or interest.
"The curriculum was admired for the breadth of subjects it covered."
The plural "breadths" is uncommon and appears mainly in technical or descriptive writing referring to multiple distinct measurements.
"The architect compared the breadths of the three doorways before ordering materials."
Despite meaning "wide," the word breadth itself is just five letters deep — and it's the rare abstract quality you can literally measure with a ruler.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of breadth
Breadth derives from Old English "brǣdu," formed from "brād" (broad) with the abstract-noun suffix that also produced "depth" and "length." The modern form arose in Middle English through the addition of the "-th" ending, following the pattern of related dimensional nouns. Its closest relatives are "broad" and its derivatives such as "broaden," all tracing back to the same Germanic root. The word has carried both its literal and figurative senses since early in its recorded history.
Related word forms
How breadth is actually used
"Breadth" leans slightly formal or literary compared to "width." In technical contexts such as engineering or construction, both terms may be used, but in academic or evaluative writing, "breadth" almost always carries the figurative sense of comprehensive range rather than literal dimension.
Easily confused with breadth
"Breath" is the air taken into and expelled from the lungs, while "breadth" means width or scope — they differ by only a silent 'd' in spelling.
"Width" is the everyday neutral term for side-to-side measurement, whereas "breadth" often carries a slightly more formal tone or a figurative sense of range and comprehensiveness.