Dereliction

1. (n.) The act of leaving with an intention not to reclaim or resume; an utter forsaking abandonment.

2. (n.) A neglect or omission as if by willful abandonment.

3. (n.) The state of being left or abandoned.

4. (n.) A retiring of the sea, occasioning a change of high-water mark, whereby land is gained.

Thesaurus Entries

Punic faith, abuse, apostasy, atrocity, bad faith, barratry, betrayal, bolt, breach, breach of faith, breach of promise, breach of trust, breakaway, crime, crime against humanity, culpa, culpable negligence, deadly sin, default, defection, delinquency, deserter, desertion, disaffection, disconformity, disloyalty, disregard, enormity, error, evil, failure, faithlessness, falseness, falsity, fault, felony, fickleness, genocide, guilty act, heavy sin, impropriety, inadvertence, inadvertency, inattention, inconstancy, indiscretion, inexpiable sin, infidelity, iniquity, injury, injustice, inobservance, laches, laissez-faire, lapse, laxity, laxness, looseness, mala fides, malefaction, malfeasance, malum, minor wrong, misdeed, misdemeanor, misfeasance, misuse, mortal sin, neglect, neglectfulness, negligence, nonadherence, noncompliance, nonconformance, nonconformity, nonfeasance, nonfulfillment, noninterference, nonobservance, nonperformance, nonrestriction, offense, omission, outrage, overlooking, oversight, peccadillo, peccancy, permissiveness, poor stewardship, procrastination, ratting, recreancy, remissness, schism, secession, sin, sin of commission, sin of omission, sinful act, slackness, slight, slip, tort, transgression, trespass, trip, trothlessness, unfaith, unfaithfulness, unloyalty, unobservance, unrigorousness, unsteadfastness, untrueness, unutterable sin, venial sin, walkout, wrong