In British English the term "short trousers" has been used, but only for shorts that are a short version of real trousers (pants), e.g. tailored shorts, often lined, as typically worn as part of school uniform for boys up to their early teens, and by servicemen and policemen in tropical climates. The American term "short pants" is probably the nearest equivalent in the US, there they might now be called "dress shorts", a term that has not gained much currency in Britain. A somewhat similar garment worn by men in Australia is called "stubbies". "Shorts" is used unqualified in British English to refer to sports shorts, athletic shorts, or casual shorts: the last is nowadays commonplace in warm weather in the UK.

The term "boxer shorts" was an American coinage for a particular kind of men's underwear, and is now common in Britain. However, boxer shorts are often referred to as "boxers" in the USA. The word "pants" refers to outerwear (trousers) in American usage (except when modified to "underpants") but when used unqualified in British English generally means underwear.

Europe and America

In much of Europe and the Americas during the 19th and early 20th centuries, shorts were worn as outerwear only by young boys until they reached a certain height or maturity. When boys got older, typically around puberty, they would receive their first pair of long trousers. This produced the perception that shorts were only for young boys. Because of this, men would not wear shorts to avoid looking immature. Women tended not to wear shorts in most cultures, due to social mores: they were expected to wear dresses, or skirts and blouses.

In the 1890s, knee pants (an early type of short pants) became the standard wear for American boys. Many urban school portraits from the 1890s show all but the oldest boys wearing knee pants. North American boys normally wore knee pants with short stockings. This began to change after the 1900s when North American boys began wearing knickerbockers, while short pants became more popular in Europe. In the 1930s, shorts started to be worn for casual comfort (e.g. outdoor and athletic activities) by both men and women. However, it was still taboo to wear shorts outside certain activities.

Since about the time of The First World War, when many soldiers served in tropical locations, adult men have worn shorts more often, especially in summer weather, but the perception of shorts as being only for young boys took several decades to change, and to some extent still exists in certain circles. By the late 20th century however it became common for men to wear shorts as casual wear in summer.

However, in many countries there are few formal settings where wearing shorts would be acceptable, as they are considered casual wear. Notable exceptions where men may wear short trousers to the office or at a formal gathering are South Africa, Bermuda, Australia and New Zealand. Since the 1990s, casual office dress has grown to include formal shorts in some UK and U.S. businesses, but by no means universally.

Worldwide

Adults are also commonly seen wearing shorts, however wearing shorts is less common among women in traditional eastern countries than in the West, although this varies widely by region - women more often wear shorts in large, cosmopolitan cities. In some countries adult women can be seen wearing loose-fitting shorts that end at or just below the knee, as these are seen as sufficiently modest.