Entry 2 senses · 2 variants Webster, 1913 Delinquent /dĭl-ĭng'-kwənt/ · De·lin·quent · IPA /dɪˈlɪŋkwənt/ a. n. 01 a. Failing in duty; offending by neglect of duty. 1. Failing in duty; offending by neglect of duty. 02 n. One who fails or neglects to perform his duty; an offender or transgressor; one who commits a fault or a crime; a culprit. 1. 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.