(1):

(n.) A winding stairway.

(2):

(n.) A frame consisting of two bars crossing each other at right angles and turning on a post or pin, to hinder the passage of beasts, but admitting a person to pass between the arms; a turnstile. See Turnstile, 1.

(3):

(n.) A turnpike road.

(4):

(n.) A gate or bar set across a road to stop carriages, animals, and sometimes people, till toll is paid for keeping the road in repair; a tollgate.

(5):

(n.) A beam filled with spikes to obstruct passage; a cheval-de-frise.

(6):

(v. t.) To form, as a road, in the manner of a turnpike road; into a rounded form, as the path of a road.