What is Self-policing?

Self-policing definition and meaning on Dictionary terms:
Also called police force. an organized civil force for maintaining order, preventing and detecting crime, and enforcing the laws.
(used with a plural verb) members of such a force: Several police are patrolling the neighborhood.
the regulation and control of a community, especially for the maintenance of public order, safety, health, morals, etc.
the department of the government concerned with this, especially with the maintenance of order.

any body of people officially maintained or employed to keep order, enforce regulations, etc.
people who seek to regulate a specified activity, practice, etc.: the language police.
Military. (in the U.S. Army) the cleaning and keeping clean of a camp, post, station, etc. the condition of a camp, post, station, etc., with reference to cleanliness.

verb (used with object), po