adj. & n.
adj. 1 abandoned, ownerless (esp. of a ship at sea or an empty decrepit property). 2 (esp. of property) ruined; dilapidated. 3 US negligent (of duty etc.).
n. 1 a social outcast; a person without a home, a job, or property. 2 abandoned property, esp. a ship.
[ L derelictus past part. of derelinquere (as DE-, relinquere leave) ]