Trouser can be defined as a garment extending from the waist to the knee or ankle, covering each leg separately; "he had a sharp crease in his trousers". Trousers (or "pants" in North American English) are an item of clothing worn on the lower part of the body and covering both legs separately (rather than together as in skirts and dresses).
Trousers are worn at the hips or waist, and may be held up by their own fastenings, a belt, or suspenders. Leggings are form-fitting trousers of a clingy material, usually a knit. Trousers, together with a shirt, are the standard clothing for men in many parts of the world.
Trousers were introduced into European society at several points in history, but gained their current predominance only in the 16th century. It is customary in the western world for men to wear trousers and not skirts or dresses. However, there are exceptions such as the Scottish kilt and the Greek tsolias, which are worn on ceremonial occasions, as well as clothing such as cassocks etc of religious functionaries.
A very common type of strong, informal trousers made of thick blue cloth is blue jeans.Among certain groups saggy, baggy pants exposing underwear are in fashion, e.g. among skaters, for whom it also provides more freedom of movement. Cut-offs are homemade shorts made by cutting the legs off trousers.
- Length: They can cover the body from the waist all the way down to the top of the foot, or stop almost anywhere from upper thigh to ankle. The most common short pants, known as shorts, are usually informal wear and stop anywhere from the upper thigh to the knee. Capris are womens pants that end mid-calf or just below the calf.  (Some trousers have detachable legs, usually with zippers.
- Pockets: There may be front pockets (usually inset) and back pockets (usually patch).
- Turn-ups or cuffs (the bottom of the trouser leg folded up) may or may not be present
- Pleats: vertical folds in the front for a looser fit
- Waist band may be elasticized
- Fly: This allows easier dressing and for men urination without undressing. The fly may further be distinguished by the closure mechanism: zipper or buttons. There may not be a fly.
- Leg shape: The trouser legs may be straight, or tapered to be snug around the ankles. The bottom may be flared, in which case the trousers can be called "bell-bottoms".
- Beltloops may or may not be present to support a belt, which may be used to adjust the tightness in the waist, and for decoration. Men can use suspenders (called braces in British English) to support trousers that are loose in the waist.