Real Dictionary

derelict
adjective: A place or building that is derelict is empty and in a bad state of repair because it has not been used or lived in for a long time.
countable noun: A derelict is a person who has no home or job and who has to live on the streets.

derelict in American English
a property abandoned by the owner; esp., an abandoned ship on the open sea
deserted by the owner; abandoned; forsaken
adjective: left or deserted, as by the owner or guardian; abandoned
noun: a person abandoned by society, esp. a person without a permanent home and means of support; vagrant; bum

derelict in British English
adjective: deserted or abandoned, as by an owner, occupant, etc
noun: a person abandoned or neglected by society; a social outcast or vagrant