I. ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English turnepike, from turnen to turn + pike (point)
1. obsolete : a revolving frame bearing spikes and used as a barrier in medieval warfare
2. : toll bar , tollgate
3. or turnpike road
a. : a toll road ; especially : a toll expressway
b. : a free road originally maintained as a toll road
c. : a main road : a paved highway having a crowned surface
4. Scotland : a winding spiral stairway
II. transitive verb
( -ed/-ing/-s )
1. : to make into or like a turnpike road
2. : crown 5c