Simple Definition of dereliction
: the act of no longer caring for, using, or doing something : the act of abandoning something
: the condition of being no longer cared for
law : failure to do your job or duty : failure to do what you should do
Examples of dereliction
the dereliction of a cause by its leaders
The officer was formally charged with dereliction of duty.
a serious dereliction of duty
First Known Use of dereliction
Learn More about dereliction
Thesaurus: All synonyms and antonyms for "dereliction"
Seen and Heard
What made you want to look up dereliction? Please tell us where you read or heard it (including the quote, if possible).