(slang) A final portion of a beverage drink, often with coffee drinks or alcoholic mixes, that will fill a cup to the top.

A uniquely addressable lockable box located on the premises of a post office that may be hired as collection point for mail. / (electricity) A test instrument once used by telephone engineers.

(Canada) An agent of municipal law enforcement responsible for ensuring obedience to the bylaws.

(US, Canada, law enforcement) A civil law enforcement officer with a duty to maintain law and order, i.e. bylaw officer, police officer, sheriff, etc.

The officer in command of, and typically having ultimate authority over, a military unit.

plural of jack-in-office

(derogatory) A self-important but minor official.

(law) A public officer authorized to hear and decide cases in a court of law. / (law) A huissier de justice, a process server and officer of the court in several European countries.

plural of post office box

(dated) copper wire with a strong but light insulation, used in wiring houses, etc.