mock-up UK /ˈmɒkˌʌp/US /ˈmɑkˌʌp/noun 2mock up verb 1forms 4 noun2 •A scale or full-size model of a design or device which is not fully functional, used for teaching, demonstration, design evaluation, promotion, or other purposes. •A prototype, usually low-fidelity, such as a paper illustration, screenshot, or simple screen configuration with limited interaction.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 mock up verb1 •To create a model or demonstration; to create a preliminary version or sample.They used paper and cardboard to mock up the layout for the control panel. formsmocked up · mocking up · mocks up · mock-ups