Source : Webster's Revised Unabridged Dictionary (1913)

Delinquent \De*lin"quent\a. [L. delinquens, -entis, p. pr. of
   delinquere to fail, be wanting in one's duty, do wrong; de- +
   linquere to leave. See {Loan}, n.]
   Failing in duty; offending by neglect of duty.

Delinquent \De*lin"quent\, n.
   One who fails or neglects to perform his duty; an offender or
   transgressor; one who commits a fault or a crime; a culprit.

         A delinquent ought to be cited in the place or
         jurisdiction where the delinquency was committed.
                                                  --Ayliffe.

Source : WordNet®

delinquent
     adj 1: guilty of a minor misdeed; "delinquent minors"
     2: failing in what duty requires; "derelict (or delinquent) in
        his duty"; "neglectful of his duties"; "remiss of you not
        to pay your bills" [syn: {derelict}, {neglectful}, {remiss}]
     3: persistently bad; "school for delinquent boys"
     4: past due; not paid at the scheduled time; "an overdue
        installment"; "a delinquent account" [syn: {overdue}]
     n : a young offender [syn: {juvenile delinquent}]