1. Containing plenty; copious; abundant; ample; as, a plentiful harvest; a plentiful supply of water.
2. Yielding abundance; prolific; fruitful. If it be a long winter, it is commonly a more plentiful year. (bacon)
3. Lavish; profuse; prodigal. He that is plentiful in expenses will hardly be preserved from (bacon) Plentifully, Plentifulness.