What does bast mean?
Bast is the strong, flexible fibre found in the inner bark of certain woody plants, most notably the lime or linden tree, as well as flax, hemp, and jute. Long before cotton became widely available, people across Europe and Asia stripped this layer from branches, soaked and beat it to separate the long fibres, and twisted them into rope, twine, mats, baskets, sandals, and even coarse clothing. In modern botany the word is also applied more precisely to the phloem — the tissue that carries sugars from a plant's leaves down to its roots. The term appears mainly in specialist contexts: botany, textile history, archaeology, and discussions of traditional crafts, where bast artefacts survive remarkably well in wet archaeological sites. Though uncommon in everyday speech, it remains a precise and evocative word for one of humanity's oldest raw materials, connecting readers to millennia of fibre craft.
The fibrous inner bark of trees such as the lime, or of plants like flax and hemp, used for making rope, matting, and coarse textiles.
"She peeled away the outer bark to reveal the pale strands of bast beneath."
Also used in botany to refer specifically to phloem tissue.
(Botany) The phloem of a plant — the tissue conducting dissolved sugars from the leaves to other parts of the plant.
"Under magnification, the slide showed the sieve tubes of the bast clearly."
This sense is confined to technical botanical usage.
Rarely pluralised; the plural is used only when referring to several distinct types or specimens of bast fibre.
"Different basts vary greatly in strength and fineness."
Before rope was cheap, people made it by soaking strips of linden bark — that pliable inner layer is called bast, and humans have been weaving it for thousands of years.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bast
The word bast derives from Old English "bæst", which in turn comes from Proto-Germanic roots shared with Dutch "bast" and German "Bast", both meaning the same fibrous bark. It has been part of English since at least the medieval period, reflecting how central lime-bark fibre was to early northern European material culture. Its Germanic lineage distinguishes it from many botanical terms borrowed later from Latin and Greek, though in modern usage it overlaps with the Latinate term "phloem" coined in the nineteenth century.
Related word forms
How bast is actually used
A technical term most familiar in botany, textile history, and traditional crafts; rare in everyday conversation but standard in specialist writing on fibres and plant anatomy.
Easily confused with bast
"Baste" is a verb meaning to moisten food while cooking or to sew with loose stitches, while "bast" is a noun denoting plant fibre from inner bark.