* Future generations: People who will live after the present time. For example, "He wrote his memoirs hoping they would be read by posterity."
* The descendants of a person: The children, grandchildren, and so on, of someone.
* The state of being famous or remembered in the future: For example, "He built a legacy for himself that will ensure his posterity."
Let me know if you were looking for a different word or if you have any other questions!