What does "clover" mean?

Clover: A plant of differend species of the genus Trifolium; as the common red clover, T. pratense, the white, T. repens, and the hare's foot, T. arvense. Clover weevil (Zoöl.) a small weevil (Apion apricans), that destroys the seeds of clover. -- Clover worm (Zoöl.), the larva of a small moth (Asopia costalis), often very destructive to clover hay. -- In clover, in very pleasant circumstances; fortunate. [Colloq.] - - Sweet clover. See Meliot.