CABabbr. Civil Aeronautics Boardcab 1 (k?b)n.1. A taxicab.2. The covered compartment of a heavy vehicle or machine, such as a truck or locomotive, in which the operator or driver sits.3. A one-horse vehicle for public hire.intr.v. cabbed, cab·bing, cabs 1. To ride or travel in a taxicab: We cabbed to the opera.2. To drive a taxicab: He cabs for a living.[Short for cabriolet.]cab 2 also kab (k?b)n. An ancient Hebrew unit of measure equal to about 2 liters (2.1 quarts).[Hebrew qab.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.cab (kæb) n1. (Automotive Engineering) a. a taxib. (as modifier): a cab rank. 2. (Automotive Engineering) the enclosed compartment of a lorry, locomotive, crane, etc, from which it is driven or operated3. (Automotive Engineering) (formerly) a light horse-drawn vehicle used for public hire4. first cab off the rank informal Austral the first person, etc, to do or take advantage of something[C19: shortened from cabriolet]cab (kæb) or kabn (Units) an ancient Hebrew measure equal to about 2.3 litres (4 pints)[C16: from Hebrew qabh container, something hollowed out]CAB abbreviation for 1. (Social Welfare) (in Britain) Citizens’ Advice Bureau 2. (Aeronautics) (in the US) Civil Aeronautics Board Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014cab1 (kæb) n., v. cabbed, cab?bing. n. 1. a taxicab. 2. a horse-drawn vehicle for hire. 3. the covered part of a locomotive, truck, etc., where the operator sits. v.i. 4. to ride in a cab. [1640?50; short for cabriolet] cab2 (kæb) n. an ancient Hebrew measure equal to about 2 quarts (1.9 liters). [1525?35;