a young offender
"The community center organized an after-school program to keep at-risk delinquents off the streets during the summer break."
One who disobeys or breaks rules or laws.
"The judge ordered community service for the delinquent who had been caught stealing from a local shop."
failing in what duty requires
"derelict (or delinquent) in his duty"
"neglectful of his duties"
"remiss of you not to pay your bills"
past due; not paid at the scheduled time
"an overdue installment"
"a delinquent account"
Late or failing to pay a debt or other financial obligation, like a mortgage or loan.
"The bank called repeatedly because my mortgage payments had been delinquent for two months."