(business) The highest-ranking corporate officer or executive officer of a corporation, company, or agency, responsible for carrying out the policies of the board of directors on a day-to-day basis; CEO.

The postal facility that deals with mail that cannot be delivered.

The highest-ranking corporate officer handling the legal affairs of a corporation, or agency.

plural of chief executive officer

(business) A corporate officer of a corporation, company, or agency, responsible for executing decisions of the chief executive officer (CEO) according to their decided schedule; often initialised as COO.

plural of civil enforcement officer

(UK) A person employed to enforce parking, traffic and other restrictions and laws in England and Wales, formerly known as a parking attendant.

(US, euphemistic) An incident in which a police officer shoots at another person.

plural of non-commissioned officer

(Canada, Navy) A warrant officer belonging to one of the two classes of chief petty officer: chief petty officer first class and chief petty officer second class.