lost property

noun lost properties

1. UK, uncountable, usually A help desk or department in a store, mall, or other such facility where customers who have lost an item can inquire as to whether it has been found and turned in; a lost and found. Lockwood is the junction for the picturesque branch to Meltham, where an old lost-property book recorded the finding of a "bow with two arrows" in a train, in 1873.
2. uncountable, usually Property that is found in such a state as to make it likely that the original owner unintentionally ceased to be in possession of the property, and would be unable to locate the property.