What is Cab ?
Cab is (noun) 1. a taxi, a car which takes people from one place to another for money He took a cab to the airport. She whistled for a cab. Can you phone for a cab, please? The office is only a short cab ride from the railway station. Cab fares are very high in New York. 2. a separate part of a large vehicle for a driver The truck driver climbed into his cab and started the engine.
source: Easier English, Student Dictionary Upper Intermediate Level