A shoe is a piece of footwear for humans, less than a boot and more than a slipper. This footwear is shaped to fit the foot (or the area below the ankle) with a flexible upper part of leather (or plastic) usually and a sole and heel of heavier material. Shoes differ from boots by not extending past the ankle. A moccasin is a specialized soft leather shoe worn by the Native Americans.
Because of (potential) foot odor, some people hate it if other people take their shoes off in their company. On the other hand, in some cultures (e.g. in Sweden or Japan), shoes are customarily removed when visiting someone's home. Guests do this to avoid tracking in dirt from outside and thus inconveniencing their host.
In trains it is often allowed to put one's feet on the opposite seat, provided that one takes one's shoes off or put them on a newspaper, piece of clothing, bag, etc., to avoid possible dirtying of the seat.
In mechanical engineering, a shoe (or brake shoe) is the restraint provided to the linings of the brake moving hydraulically against the brake drum to stop its rotation. This type of shoe is commonly referred to as brake lining. It is also be plate between moving parts (and / or stationary parts) on to take the friction and allow means of adjustment. It is also be an outer cover treading of a pneumatic tire.
A horseshoe is nailed to underside of horse's hoof and serves a similar function as footwear for horses, and is installed by a farrier. This plate (or rim) is placed so as to prevent injury to the animal.
In card games, a shoe is used to hold several decks of cards, typically used in games such as blackjack and baccarat. It has a slit at the bottom which allows one to draw one card at a time.
