Yard grass Meaning, Definition & Usage

  1. noun coarse annual grass having fingerlike spikes of flowers; native to Old World tropics; a naturalized weed elsewhere
    Eleusine indica; goose grass; wire grass; yardgrass.

WordNet

Definitions
  1. (Bot.), a low-growing grass (Eleusine Indica) having digitate spikes. It is common in dooryards, and like places, especially in the Southern United States. Called also crab grass.

Webster 1913