(of a bill, bond, or insurance policy etc) due for payment or repayment
These are the rates currently available for renewing a mature bond.
if someone is mature then they behave in the way that you would expect an adult to behave; sensible; reasonable;
"A mature man would not do any of these things" he said.
well-established; stable; reliable
Hong Kong is a mature insurance market, with talented professionals and a well- established legal structure.