👉 In the context of security and transportation systems, a "turnstile" is a device used to control access to an entrance or exit at a public place. It typically consists of a metal plate that rotates when a person enters or exits, allowing only those with valid identification to pass through. The term "turnstiles" is often used interchangeably with turnstrokes or turnstoves in the context of transportation systems like buses and trains, where they are devices used to control the movement of passengers