Any plant of the family Poaceae, characterized by leaves that arise from nodes in the stem and leaf bases that wrap around the stem, especially those grown as ground cover rather than for grain.
Various plants not in family Poaceae that resemble grasses.
From Middle English gras, gres, gers, from Old English græs, gærs, from Proto-West Germanic *gras, from Proto-Germanic *grasą ("grass"), from Proto-Indo-European *gʰreh₁- ("to grow").
Cognate with Scots girs, gers, gress, North Frisian gäärs, geers, Saterland Frisian Gäärs ("grass"), West Frisian gers ("grass"), Low German Gras ("grass"), Dutch gras ("grass, turf, pasture"), German Gras ("grass, weed"), Danish græs ("grass"), Swedish gräs ("grass"), Norwegian Bokmål gress ("grass"), Faroese, Icelandic and Norwegian Nynorsk gras ("grass"), Latin herba ("plant, weed, grass"), Albanian grath ("grass blade, spike"). Related to grow, green.
The "informer" sense is probably a shortening of grasshopper, rhyming slang for copper or shopper (the exact sequence of derivation is unclear).
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