- The race that proceeds from a progenitor; offspring to
the furthest generation; the aggregate number of persons who are
descended from an ancestor of a generation; descendants; -- contrasted
with ancestry; as, the posterity of Abraham. - Succeeding generations; future times.
Meaning of 'posterity' (Princeton's WordNet)
1 . posterity
[ n]
Meaning (1): - all of the offspring of a given progenitor
Example in sentence:
we must secure the benefits of freedom for ourselves and our posterity