- 1a tall reed-like water plant with strap-like leaves and a dark brown velvety cylindrical head of numerous tiny flowers. Also called reed mace.
- Genus Typha, family Typhaceae: several species, in particular T. latifolia
- 2another term for clubrush.
late Middle English: probably from bull1 in the sense 'large or coarse', as in words such as bullfrog
Bulrush can also be spelled bullrush, with a double l: both are correct.