Hi everybody!
I invite to the people (all the persons) to see this links:
Some rules to nouns
http://grammar.ccc.commnet.edu/grammar/plurals.htm
Another epic conversation
http://forum.wordreference.com/showthread.php?t=780490
I quote again a dictionary, the Merriam-Webster (too much text, but necessary):
police
Function:
noun Inflected Form(s):
plural police Usage:
often attributive Etymology: French, from Old French, from Late Latin
politia government, administration, from Greek
politeia, from
politēs citizen, from
polis city, state; akin to Sanskrit
pur rampart, Lithuanian
pilis castle Date: 1716
1 a: the internal organization or regulation of a political unit through exercise of governmental powers especially with respect to general comfort, health, morals, safety, or prosperity b
: control and regulation of affairs affecting the general order and welfare of any unit or area c
: the system of laws for effecting such control
2 a
: the department of government concerned primarily with maintenance of public order, safety, and health and enforcement of laws and possessing executive, judicial, and legislative powers b
: the department of government charged with prevention, detection, and prosecution of public nuisances and crimes
3 a: police force bplural : police officers
4 a
: a private organization resembling a police force <campus
police> b
plural : the members of a private police organization
5 a
: the action or process of cleaning and putting in order b
: military personnel detailed to perform this function
6
: one attempting to regulate or censor a specified field or activity <the fashion
police>
I think is remarkable the third sense of the word. I compare police with another noun:
policeman
1
: a member of a
police force
Really I think there aren´t controversy.