Definition of grey poplar in English:

grey poplar

(US gray poplar)

noun

  • A poplar tree (genus Populus); specifically the large P.x canescens of Europe, a hybrid between white poplar (P. alba) and aspen (P. tremula), much planted in damp areas.

Origin

Late 18th century; earliest use found in John Scott (1731–1783), poet and writer.