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fastback

[fast-bak, fahst-]
noun
  1. a form of back for an automobile body consisting of a single, unbroken convex curve from the top to the rear bumper.
  2. a car having such a back.
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Origin of fastback

An Americanism dating back to 1960–65; fast1 + back1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for fastback

fastback

noun
  1. a car having a back that forms one continuous slope from roof to rear
  2. British a type of pig developed from the landrace or large white and bred for lean meat
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012