What is the full form of WC?
As mentioned above the abbreviation WC stands for water closet. This is a toilet that employs water to flush waste down the drainage to a separate septic tank for later disposal and is mostly located indoors. The opposite of this would be a pit latrine or "long drop" which is also a toilet that needs no water for flushing since the waste goes straight to the septic chamber and is located outdoors. The water closet traces its origins in England "The "water-closet" was invented in England around 1870. It did not reach the United States until the 1880s. Around this time, only luxury hotels and wealthy people had indoor private bathrooms." In modern times the term water closet is used to distinguish toilets from urinals by manufacturers of plumbing fixtures.
I assume that you are asking about the term “WC” as it is used mostly in European countries. This is a term used to refer to a toilet or to the room in which the toilet is located. This term is not used very often in the United States. In this case, WC comes from the words “water closet.”
In medieval and early modern times, indoor toilets generally consisted of a seat over a chamber pot in a closet or other small room. Of course, it was generally only the elites who had such things. When various inventors started to come up with ways to use water to flush away the waste, the devices came to be known as water closets. This got shortened to “WC.”
It is water closet.
Yes, it must be water closet
In the Netherlands, we use watercloset (without 'space' between)
The full form of WC is water closet.