Definition of bulrush
:any of several large rushes or sedges growing in wetlands: such as
a
:any of a genus (Scirpus, especially S. lacustris) of annual or perennial sedges that bear solitary or much-clustered spikelets containing perfect flowers with a perianth of six bristles
b
British
:either of two cattails (Typha latifolia and T. angustifolia)
c
:papyrus
