1
- in a very poor condition as a result of disuse and neglect废弃的, 破旧的：
a derelict Georgian mansion
年久失修的乔治王朝时代的府邸
the barge lay derelict for years.
那驳船已被废置多年。
1.1
- chiefly N. Amer. (of a person) shamefully negligent in not having done what one should have done〈主北美〉（人）玩忽职守的, 不负责任的：
he was derelict in his duty to his country.
他玩忽职守, 未能履行对国家的职责。
1
- a person without a home, job, or property流浪汉, 无家可归的人：
derelicts who could fit all their possessions in a paper bag.
可以把所有家当都放在一只纸袋中的流浪者。
1.1
- a piece of property, especially a ship, abandoned by the owner and in poor condition废弃物（尤指废弃船只）。
词源
mid 17th cent.: from Latin derelictus 'abandoned'， past participle of derelinquere, from de- 'completely' + relinquere 'forsake'.