turnstile

American  

[turn-stahyl] / ˈtɜrnˌstaɪl /

noun

1. a structure of four horizontally revolving arms pivoted atop a post and set in a gateway or opening in a fence to allow the controlled passage of people.

2. a similar device set up in an entrance to bar passage until a charge is paid, to record the number of persons passing through, etc.

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turnstile British  

/ ˈtɜːnˌstaɪl /

noun

1. a mechanical gate or barrier with metal arms that are turned to admit one person at a time, usually in one direction only

2. any similar device that admits foot passengers but no large animals or vehicles

3. Also called: gatepost.  logic a symbol of the form ̃⊢, ⊨, or ⊩, used to represent logical consequence when inserted between expressions to form a sequent, or when prefixed to a single expression to indicate its status as a theorem

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Etymology

Origin of turnstile

First recorded in 1635–45; turn + stile ¹

Related Words

• bar
• door
• doorway
• exit
• fence
• port