What does tarn mean?
A tarn is a small mountain lake, especially one lying in a high, cold, or rugged landscape. The word is used in Britain and the United States and is often associated with the Lake District and other northern British uplands, though it now applies to comparable lakes elsewhere. A tarn may be a clear, still pool beneath a ridge or an enclosed upland hollow filled with water, and it is commonly discussed in terms of its depth, colour, or isolation. Because the word is more specific than lake and more suggestive of terrain than pool, it lends itself well to descriptions of remote mountain scenery. Tarn also occurs as a literary adjective meaning dark brown or black, as in the phrase “tarn-black” water. The lake term entered English through northern usage and may ultimately derive from a Scandinavian word for a pool or lake, although its exact origin remains uncertain.
A small mountain lake, especially one surrounded by high or rugged terrain.
"The trail ended beside a glassy tarn beneath the fells."
Originally associated especially with northern England and Scotland, but now used generally for small mountain lakes.
Of a dark brown or black colour.
"His boots were stained tarn-black by the peat."
Chiefly literary or poetic.
The standard plural is tarns; when used attributively, it appears as “mountain tarns.”
"Several remote mountain tarns reflect the morning sky."
A tarn is a small mountain lake—and the word has also entered poetry, where it can describe a deep, tarn-black shade.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tarn come from?
The lake noun was recorded in northern English by the early 17th century, although its ultimate origin remains uncertain. It is commonly linked to Old Norse tjorn, meaning “pool” or “lake,” and to related Scandinavian forms such as Icelandic tjörn, Faroese tjørn, and the older Swedish form tjärn. Its meaning later broadened from northern mountain lakes to the more general geographical sense now familiar in English.
How tarn is actually used
The lake term was especially associated with northern British uplands but is now used more generally in British and American English. As an adjective meaning dark brown or black, it is chiefly literary.
Easily confused with tarn
A tarn is a small mountain lake, whereas to tarnish means to dull a surface or diminish something's brightness or reputation.