severalty
The sole ownership of property by someone.
countable, uncountable
The quality of being several or separate.
countable, uncountable
[…] thus a joint submission to arbitrament may be taken severally in respect of the severalty of the causes.
Where it comes from
From Middle English severalte, from Middle French severalte. By surface analysis, several + -ty.
Adapted from the Wiktionary entry severalty (CC BY-SA 4.0).