an annual grass, Digitaria sanguinalis, common in cultivated and waste grounds and often occurring as a pest weed in lawns.
Origin of crab grass
First recorded in 1590–1600
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for crab grass
Historical Examples of crab grass
It was autumn, and streaks of gray could be seen in the crab-grass.
In the economy of farmers entirely up against the crab-grass in the cotton-patch, the mule is mightier than the sword.
In my opinion, crab-grass would answer well for pasture-grass in moist situations.
British Dictionary definitions for crab grass
any of several coarse weedy grasses of the genus Digitaria, which grow in warm regions and tend to displace other grasses in lawns
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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