Definition of "bulrush"

(biblical) A plant referred to in the story of Moses as growing along the banks of the Nile, which is believed to be the papyrus (Cyperus papyrus).  examples

Any of various tall, narrow-leaved plants growing near water, especially cattail or reedmace, in the genus Typha.  examples

(Americas) Sedges in the genera Bolboschoenus or Schoenoplectus (formerly considered Scirpus), having clusters of spikelets.  examples

(Australia) Any of various reed-like plants growing near water, especially Typha domingensis and Typha orientalis; cumbungi, wonga.  quotations  examples