Definitions
1.nounProperty abandoned by its former owner, especially a ship abandoned at sea.
2.nounAn abandoned or forsaken person; an outcast.
3.nounA homeless and/or jobless person; a person who is (perceived as) negligent in their personal affairs and hygiene. (This sense is a modern development of the preceding sense.)
4.adjectiveAbandoned, forsaken; given up by the natural owner or guardian; (of a ship) abandoned at sea, dilapidated, neglected; (of a spacecraft) abandoned in outer space."There was a derelict ship on the island."
5.adjectiveNegligent in performing a duty.
6.adjectiveLost; adrift; hence, wanting; careless; neglectful; unfaithful.