Computers. a computer system purchased from hardware and software vendors, customized and put in working order by a firm that then sells the completed system to the client that ordered it.
Origin of turnkey system
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for turnkey system
a computer or computer system supplied to a customer in such a complete form that it can be put to immediate use
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