Definify.com
Webster 1913 Edition
Uti possidetis
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Uˊti posˊsi-de′tis
.[L., as you possess.]
1.
(Internat. Law)
The basis or principle of a treaty which leaves belligerents mutually in possession of what they have acquired by their arms during the war.
Brande & C.
2.
(Roman Law)
A species of interdict granted to one who was in possession of an immovable thing, in order that he might be declared the legal possessor.
Burrill.