do·min·ion /də-'min-yən/ n
1 a: supreme authority: sovereignty
b: a territory over which such authority is exercised
c often cap: a self-governing nation (as Canada) of the Commonwealth other than the United Kingdom that acknowledges the British monarch as the head of state
2: the power (as authority) or right (as ownership) to use or dispose of property; specif: absolute or exclusive use, control, ownership, or possession of property
the transferred property is placed beyond the donor's dominion and control — W. M. McGovern, Jr. et al.
the bailee exercised dominion over the vehicle
Merriam-Webster’s Dictionary of Law. Merriam-Webster. 1996.