Seeing a “WC” sign outside a public restroom can confuse travelers, especially since different countries use different terms like bathroom, restroom, washroom, or toilet.
“WC” stands for “water closet,” a traditional term used to describe a small room containing a toilet and often a sink. While the phrase may sound outdated today, it is still commonly used on signage in places such as airports, hotels, and restaurants—especially in Europe and other international settings.
Historically, the term dates back to the rise of indoor plumbing in the 19th century. At the time, a “water closet” referred specifically to a separate enclosed space designed for a flush toilet, distinct from bathing areas. As indoor plumbing became more widespread, the design of homes evolved, eventually combining bathing and toilet facilities into a single bathroom in many regions.
Over time, different English-speaking countries developed their own preferred terms. In the United States, “restroom” and “bathroom” are most common, while Canada often uses “washroom.” In the United Kingdom and other regions, “loo” or “WC” is frequently seen in public signage.
Despite the variation, all of these terms refer to the same basic idea: a room with toilet facilities. “WC” simply remains a more formal, international shorthand that continues to appear in public spaces around the world.
