adjective
Given up by the guardian or owner; abandoned, forsaken.
(by extension) Of property: in a poor state due to abandonment or neglect; dilapidated, neglected.
(figurative) Adrift, lost.
(chiefly US) Negligent in performing a duty; careless.
noun
(uncountable) Property abandoned by its former guardian or owner; (countable) an item of such property.
(countable, dated) An abandoned or forsaken person; an outcast, a waif.
(countable, by extension, derogatory) A homeless or jobless person; a vagrant; also, a person who is (perceived as) negligent in their hygiene and personal affairs.
(countable, chiefly US) A person who is negligent in performing a duty.
verb
(transitive) To abandon or forsake (someone or something).
(intransitive) To neglect a duty.