n. a vehicle that passengers hire to take them between locations of their choice, the fare being calculated with a taximeter; a taxi or cab
the GNU version of the Collaborative International Dictionary of English
n. an automobile with a professional driver which can be hired to carry passengers; -- also called a taxi, and informally called a cab or a hack. The driver of a taxicab is referred to as a cab driver or cabbie, and sometimes as a chauffeur or hackie.
The Century Dictionary and Cyclopedia
n. A public ‘cab’ or carriage which carries a fare-indicator. See taximeter.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a car driven by a person whose job is to take passengers where they want to go in exchange for money
Word Usage
"New Yorkers, and Americans in general, are indeed given to using cab, cropped from the back end of the word taxicab, interchangeably with taxi."