road where high speed driving is allowed
"The new highway was built as a dedicated speedway where cars could travel at extremely high speeds without stopping."
a racetrack for racing automobiles or motorcycles
"The crowd roared as the cars sped around the oval speedway."
A form of motorcycle racing on flat (without camber) oval dirt tracks using motorcycles with neither brakes nor gears.
"The fans cheered loudly as the racer completed a lap around the speedway, where he navigated the flat dirt oval without ever touching his non-existent brake or gear lever."
In plain English: A speedway is an oval track where motorcycles race at high speeds without using brakes to slow down between turns.
"We visited the speedway race track last weekend to watch the motorcycles compete."
Usage: Speedway refers specifically to motorcycle racing held on flat, unbanked dirt ovals where bikes are equipped without brakes or gears. This term is often confused with speed skating due to the shared "speed" prefix and track-like setting, but it strictly denotes a motorized sport rather than an ice-based one.
An enclave of Indianapolis, Wayne Township, Marion County, Indiana, United States
"Residents from the speedway in Indianapolis frequently attend races at nearby venues."
The word speedway is a straightforward combination of the words speed and way. It was formed to describe a road or track specifically designed for racing at high speeds.