Definition of superweed in English:
A weed which is extremely resistant to herbicides, especially one created by the transfer of genes from genetically modified crops into wild plants.
- People opposed to genetically modified organisms say we're going to have super weeds taking over the world.
- Scientists tackling the thorny problem of a foreign superweed hope a humble insect could halt its rampage across UK gardens.
- Even the term superweed goes back at least to 1949, in a book on hybridizing plant species.