Skip to content 
Have you ever walked through an airport, hotel, or shopping mall and noticed the letters “WC” on a restroom door? While many people recognize the symbol, surprisingly few know what it actually stands for or why it’s still used around the world. The answer dates back more than a century and offers an interesting glimpse into the history of modern plumbing and public sanitation.
What Does “WC” Actually Mean?
WC stands for Water Closet.
The term originated in the late 19th century, when indoor plumbing became more common in homes and public buildings. At the time, the room containing a flush toilet was often a small, separate space from the bathroom, which was primarily used for bathing.
Because the toilet relied on a water-flushing mechanism—a relatively new innovation—it became known as the “Water Closet.”
Why Isn’t It Just Called a Bathroom?
The words used for restrooms vary depending on the country and the type of building.
Some common terms include:
- Bathroom – Common in the United States, even when no bathtub is present.
- Restroom – Frequently used in public places across North America.
- Washroom – Common in Canada.
- Toilet – Widely used in the United Kingdom and many other English-speaking countries.
- Lavatory – Often seen on airplanes and in formal settings.
- WC (Water Closet) – Common on signs in Europe, Asia, and many international locations.
Each term reflects regional language preferences rather than different types of facilities.
Why Is “WC” Still Used Today?
Although the phrase “Water Closet” sounds old-fashioned, the abbreviation WC remains popular because it is: