Definition of "mock-up"

The second-class accommodation shown in mock-up at last year's Railway Design exhibition in London was open saloon, but there is still nagging concern that the public has expressed a clear preference for compartments.

1964 February, “British Railways' passenger plans”, in Modern Railways, page 73

A full-size mock-up carriage of a Liverpool City Region Class 777, built as a part of the design process, has been transferred to the National College for Advanced Transportation & Infrastructure (NCATI) in Doncaster, to be used as a teaching aid.

2022 January 12, “News in pictures: Liverpool carriage goes to college”, in RAIL, number 948, page 20

1930, Renwick of Otley, Pre-production Proofs and Mock-ups Documenting the Publication of "My Favourite Alphabet", Renwick of Otley

2007, Canada. Health Canada, Environics Research Group, Testing of Mock-ups of Health Warning Messages and Warning Notices on Tobacco Product Advertisements for Smokeless Tobacco: Final Report, Health Canada

I knew that the software was a mock up and as such it would require the team at least half an hour to put together the components before I could proceed.

2018, Dr Low Lee Yong, I Dare to Dream - Making Possible the Impossible

This 5mm square grid notebook is great to use for diagrams, mock-ups, designs, everyday use, notes, calculations, lists, doodling, musings or other creativity projects.

2019, Squared Grid Notebook: Square Grid Notebook/Journal, Elite Blank Books