"Maturity age" refers to the point in life when someone is considered fully grown up or mature, both physically and mentally. It is the stage of life where individuals are generally responsible and can make wise decisions. Full definition
However, these policies offer a term, which is usually from 15 to 40 years and is available to individuals from the age 18 to 50 years with maximum maturity age of 65. (business-standard.com)
All the plans that you have recommended are having a maximum maturity age of 70 - 75 years. (myinvestmentideas.com)
The policy does not imply any minimum age for the maturity of the policy but the maximum maturity age for the parents is 71 years. (policybazaar.com)