A fine lustrous fiber composed mainly of fibroin and produced by certain insect larvae to form cocoons, especially the strong, elastic, fibrous secretion of silkworms used to make thread and fabric, Cloth made of silk; by extension, a garment made of such cloth, The fine, soft thread produced by various species of caterpillars in forming the cocoons within which the worm is inclosed during the pupa state, especially that produced by the larv‘ of Bombyx mori, adjective_ Made of silk, Composed of or similar to the fiber or the fabric silk, intransitive verb_ To develop silk. Used of corn