\Turn"pike`\, n. [Turn + pike.]
1. 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.
         I move upon my axle like a turnpike.  --B. Jonson.
2. 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.
3. A turnpike road. --De Foe.
4. A winding stairway. [Scot.] --Sir W. Scott.
5. (Mil.) A beam filled with spikes to obstruct passage; a
   cheval-de-frise. [R.]
{Turnpike man}, a man who collects tolls at a turnpike.
{Turnpike road}, a road on which turnpikes, or tollgates, are
   established by law, in order to collect from the users
   tolls to defray the cost of building, repairing, etc.

\Turn"pike`\, v. t. [imp. & p. p. {Turnpiked}; p. pr. &
vb. n. {Turnpiking}.]
To form, as a road, in the manner of a turnpike road; into a
rounded form, as the path of a road. --Knowles.