dereliction

noun

1. (countable, uncountable)Willful neglect of one's duty.

   “The new soldier did not clean his cabin and was scolded for dereliction and disobedience.”

   “What he did was a terrible dereliction of duty.”

   “[…] there on the table were the uncleared remains of Thursday's lunch, plain evidence of someone's dereliction.”

   “And his final act—leaving the Watch to accompany Tormund and the Wildlings back into the woods North of the wall—no longer seems like a dereliction of duty. It’s the recovery of duty, found by a man who feels he betrayed his queen, who thinks there’s no longer a place for him in these lands.”

2. (countable, uncountable)The act of abandoning something, or the state of being abandoned.

   “To this we must contend with prayer , with actual dereliction and seposition of all our other affairs”

   “There is much sad evidence, too, of the spoliation and dereliction of vanished industry: tips, slag-heaps and derelict colliery-screens among which the ubiquitous, nomad mountain sheep graze unconcernedly.”

   “After years of unsympathetic commercial use and dereliction, nothing of note remained inside, which accordingly has been reconfigured with modern amenities such as underfloor heating.”

3. (countable, uncountable)Land gained from the water by a change of water-line.