Learner's definition of PLENTIFUL
[more plentiful; most plentiful]
1 : present in large amounts
When I was a teenager, jobs were plentiful [=there were plenty of jobs] and the economy was strong.
Gasoline won't always be cheap and plentiful.
Space is plentiful enough for several homes.
plentiful amounts of rain
Natural gas is a plentiful resource.
Doctors and nurses are now in plentiful supply. = There is now a plentiful supply of doctors and nurses.
2 : containing or giving large amounts of something plentiful suggests a large or rich supply of something. abundant suggests a very large supply that is far greater than what is necessary. ample suggests an amount that may not be very large but that is more than enough in a specific situation.