Other forms: turnstiles
A turnstile is the barrier that lets one person through at a time. Through the turnstile, turnstile count, jump the turnstile.
Counting is half its purpose: turnstile figures were how attendance was measured before ticketing went electronic, and the phrase survives in football. It also enforces one ticket one person. Note that a full-height turnstile cannot be climbed, which is why they are used where fare evasion matters.
1nounturnstileThe barrier that lets one person through at a time.
“Fans pushed through the turnstiles into the football stadium.”
turnstile is a barrier.
From turn + stile.
Etymology from Wiktionary, CC BY-SA