We found 24 dictionaries that define the word mock up:

General (19 matching dictionaries)

1. mock up: Longman Dictionary of Contemporary English
2. mock-up: Merriam-Webster
3. mock-up: Oxford Learner's Dictionaries
4. mock-up, mock-up: Collins English Dictionary
5. mock-up, mock up: Vocabulary.com
6. Mock-Up, Mock-up, mock-up: Wordnik
7. mock-up: Cambridge Advanced Learner's Dictionary
8. mock-up, mock up: Wiktionary
9. mock-up: Webster's New World College Dictionary, 4th Ed.
10. mock-up: Infoplease Dictionary
11. mock-up, mock up: Dictionary.com
12. Mock-up, Mock up: Wikipedia, the Free Encyclopedia
13. mock-up, mock up: Rhymezone
14. mock-up: AllWords.com Multi-Lingual Dictionary
15. mock-up, mock up: FreeDictionary.org
16. mock-up, mock up: Mnemonic Dictionary
17. mock-up, mock up: TheFreeDictionary.com

Art (1 matching dictionary)

18. ODLIS: Online Dictionary of Library and Information Science (No longer online)

Business (1 matching dictionary)

19. mock up: Legal dictionary

Computing (1 matching dictionary)

20. mock-up, mock up: Encyclopedia

Miscellaneous (1 matching dictionary)

21. mock up: Idioms

Tech (1 matching dictionary)

22. AUTOMOTIVE TERMS (No longer online)

(Note: See mock_ups as well.)

Definitions from Wiktionary (mock up) ▸ verb:  (transitive) To create a model or demonstration; to create a preliminary version or sample. Similar: model, maquette, modell, mocque, moulage, mock'st, mime, mastercopy, meme, mustre, more... Types: model, prototype, sample, pattern, copy, more... Adjectives: telling, create, personate, increate, express, vulgate, concoct, actioned, articulate, model, inform ▸ Words similar to mock up ▸ Usage examples for mock up ▸ Idioms related to mock up ▸ Wikipedia articles (New!) ▸ Words that often appear near mock up ▸ Rhymes of mock up ▸ Invented words related to mock up