1. (Bot.) A name given to many aquatic or marsh-growing endogenous plants with soft, slender stems, as the species of Juncus and Scirpus. Note: Some species are used in bottoming chairs and plaiting mats, and the pith is used in some places for wicks to lamps and rushlights. 2. The merest trifle; a straw. John Bull's friendship is not worth a...