Definition of bast in US English:


(also bast fiber)


  • 1Fibrous material from the phloem of a plant, used as fiber in matting, cord, etc.

    • ‘Willow, lime and again oak trees give some of the most useful bast fibres.’
    • ‘Another was the lime tree whose fibrous inner bark, bast, was used for a number of purposes.’
    • ‘They are made from papyrus root, bast fiber, and banana leaves and are decorated with mud dyes in elaborate patterns.’
    • ‘Linen is from flax, a bast fiber taken from the stalk of the plant.’
    • ‘It wasn't unknown for the ribs for example to be lashed in place with bast fibre cords, that were soaked in pitch to preserve them.’
    rind, skin, peel, sheath, covering, outer layer, coating, casing, crust
    View synonyms
    1. 1.1Botany The phloem or vascular tissue of a plant.
      • ‘There was a clear deficiency of bast fibre along the length of the mutant stem.’
      • ‘The four groupings are: seed-hair fibers, leaf fibers, bast fibers, and miscellaneous fibers.’
      • ‘Ramie is also similar to linen and is a bast of plant fiber.’
      • ‘The phloem of some stems also contains thick-walled, elongate fiber cells which are called bast fibers.’
      • ‘Bast fibers come from the phloem tissues of dicotyledonous plants.’


Old English bæst; related to Dutch bast, German Bast; of unknown origin.