Definitions

1. noun

A type of coarse, annual grass, especially of the genus Digitaria, with narrow leaves and long, thin stems that often grow in dense clumps.

“The lawn is overrun with crabgrass, which is difficult to eradicate.”

2. noun

A type of coarse, annual grass that grows in lawns and fields, especially in warm and humid climates.

“Crabgrass is a common problem in many residential lawns during the summer months.”