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Stuart's Word Spot is divorced from other posts in this blog and produced in response to a request from a follower to provide just such a service.
Cab: noun – originally, a Hackney carriage, which was a horse-drawn taxi. Now a modern taxi, or a shelter on a vehicle to house the driver and the controls.
'When Robert de Nero called Jodie Foster a cab, to take her home, it was an appropriate gesture, since they were both starring in Taxi Driver at the time.'
'The hitch-hiker climbed out of the wet and into the cab, grateful the truck driver had stopped for him.'