What is Animus Revertendi?

Legal Definition
The term animus revertendi is a Latin phrase that means "With intention to return".

It can refer to an animal that is under the care of another, which distinguishes it from an animal ferae naturae (wild beast). It is a type of ownership right recognized by property law. This legal concept also supports the intent of a candidate not to abandon one's residence due to work or study. The legal residence is protected by this legal concept, as in the case of former White House Chief of Staff Rahm Emanuel's candidacy for Mayor of Chicago.
-- Wikipedia
Legal Definition
The intention of returning. A man retains his domicil, if he leaves it animo revertendi. 3 Rawle, R. 312; 1 Ashm. R. 126; Fost. 97; 4 Bl. Com. 225; 2 Russ. on Cr. 18; Pop. 42,. 62; 4 Co. 40.
-- Bouviers Law Dictionary
Legal Definition
The intention of returning. A man retains his domicile if he leaves it animo revertendi. In re Miller's Estate, 3 Rawle (Pail 312, 24 Am. Dec. 34o; 4 Bl. Comm. 225; 2 Russ. Crimes, 18; Poph. 42, 52; 4 Coke, 40. Also, a term employed in the civil law, in expressing the rule of ownership in tamed animals
-- Black's Law Dictionary