Turnstile and Weir

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

Weir and turnstile are semantically related in movable barrier at entrance topic. In some cases you can use "Weir" instead a noun "Turnstile".

Weir noun - A low dam built across a stream to raise its level or divert its flow.

Turnstile and weir are semantically related in movable barrier at entrance topic. You can use "Turnstile" instead a noun "Weir".