/bast/ , n.
1. Bot. phloem.
2. Also called bast fiber . any of several strong, woody fibers, as flax, hemp, ramie, or jute, obtained from phloem tissue and used in the manufacture of woven goods and cordage.
[ bef. 900; ME; OE baest; c. D, G, ON bast; perh. ult. c. L fascis bundle. See BASS 3 ]