1. 破败;弃置;年久失修
If a building or a piece of land is in a state of dereliction, it is deserted or abandoned.

1. willful negligence

2. a tendency to be negligent and uncaring

e.g. he inherited his delinquency from his father
his derelictions were not really intended as crimes
his adolescent protest consisted of willful neglect of all his responsibilities

Synonym: delinquencywillful neglect