What does apportionment mean?
The definition of apportionment
Ap*por”tion*ment, n.
Etym: [Cf. F. apportionnement, LL. apportionamentum.]

The act of apportioning; a dividing into just proportions or shares; a division or shares; a division and assignment, to each proprietor, of his just portion of an undivided right or property. A. Hamilton.