noun

1. Property abandoned by its former owner, especially a ship abandoned at sea.

2. An abandoned or forsaken person; an outcast.

3. A 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.)

adjective

1. Abandoned, 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.”

2. Negligent in performing a duty.

3. Lost; adrift; hence, wanting; careless; neglectful; unfaithful.

Synonyms: abandoned