Meaning

• To become better; improve in condition, especially by feeding.

• To feed (on); to revel (in).

• To thrive by feeding; grow fat; feed oneself gluttonously.

• To thrive, prosper, or live in luxury, especially at the expense of others; fare sumptuously.

  "Robber barons who battened on the poor"

• To gratify a morbid appetite or craving; gloat.

• To improve by feeding; fatten; make fat or cause to thrive due to plenteous feeding.

• To fertilize or enrich, as land.