turnstile

A mechanical device used to limit the passage of individuals moving from one public area to another to one at a time, consisting of a vertical post or frame with several bars that project from it and revolve at the same point, with the bar in the highest position being parallel to the floor.

A similar structure that permits the passage of an individual once a charge has been paid or that counts the number of individuals passing through.

A post surmounted by four horizontal arms which move round as a person passes through; a turnpike.

A revolving frame in a footpath, preventing the passage of horses or cattle, but admitting that of persons; a turnpike. See turnpike, n., 1.

A similar arrangement for registering the number of persons passing through a gateway, doorway, or the like.

A rotating mechanical device that controls and counts passage between public areas, especially one that only allows passage after a charge has been made.

a gate consisting of a post that acts as a pivot for rotating arms; set in a passageway for controlling the persons entering