Definition of black grass in English:

black grass

noun

  • 1Any of several kinds of foxtail grass which grow as weeds of cultivated land; especially slender foxtail, Alopecurus myosuroides (formerly called A. agrestis), which can cause serious yield loss in cereal crops.

  • 2North American
    Chiefly North American. A kind of rush, Juncus gerardii, found in salt marshes in North America and parts of Europe, formerly cut and dried for use as animal fodder.

Origin

Mid 18th century; earliest use found in William Ellis (c1700–1758), agriculturist and writer. From black + grass.

Pronunciation

black grass

/ˌblak ˈɡrɑːs//ˌblak ˈɡras/