What does "herb" mean?

Herb: Grass; herbage. And flocks Grazing the tender herb. Milton. Herb bennet. (Bot.) See Bennet. -- Herb Christopher (Bot.), an herb (Actæa spicata), whose root is used in nervous diseases; the baneberry. The name is occasionally given to other plants, as the royal fern, the wood betony, etc. -- Herb Gerard (Bot.), the goutweed; -- so called in honor of St. Gerard, who used to be invoked against the gout. Dr. Prior. -- Herb grace, or Herb of grace. (Bot.) See Rue. -- Herb Margaret (Bot.), the daisy. See Marguerite. -- Herb Paris (Bot.), an Old World plant related to the trillium (Paris quadrifolia), commonly reputed poisonous. -- Herb Robert (Bot.), a species of Geranium (G. Robertianum.)