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We found 41 dictionaries with English definitions that include the word mainframe:
Click on the first link on a line below to go directly to a page where "mainframe" is defined.

General (25 matching dictionaries)

1. mainframe: Merriam-Webster.com [home, info]
2. mainframe: Oxford Learner's Dictionaries [home, info]
3. mainframe: American Heritage Dictionary of the English Language [home, info]
4. mainframe: Collins English Dictionary [home, info]
5. mainframe: Vocabulary.com [home, info]
6. mainframe: Macmillan Dictionary [home, info]
7. Mainframe, mainframe: Wordnik [home, info]
8. mainframe: Cambridge Advanced Learner's Dictionary [home, info]
9. mainframe: Wiktionary [home, info]
10. mainframe: Webster's New World College Dictionary, 4th Ed. [home, info]
11. mainframe: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. mainframe: Infoplease Dictionary [home, info]
13. mainframe: Dictionary.com [home, info]
14. mainframe: Online Etymology Dictionary [home, info]
15. mainframe: UltraLingua English Dictionary [home, info]
16. mainframe: Cambridge Dictionary of American English [home, info]
17. Mainframe (G.I. Joe), Mainframe (comics), Mainframe (disambiguation), Mainframe: Wikipedia, the Free Encyclopedia [home, info]
18. mainframe: Rhymezone [home, info]
19. mainframe: Free Dictionary [home, info]
20. mainframe: Mnemonic Dictionary [home, info]
21. mainframe: WordNet 1.7 Vocabulary Helper [home, info]
22. mainframe: LookWAYup Translating Dictionary/Thesaurus [home, info]
23. mainframe: Dictionary/thesaurus [home, info]

Art (2 matching dictionaries)

24. Mainframe: English-Chinese Dictionary of Graphic Communications (Big 5) [home, info]
25. mainframe: ODLIS: Online Dictionary of Library and Information Science [home, info]

Computing (12 matching dictionaries)

26. mainframe: Free On-line Dictionary of Computing [home, info]
27. mainframe: Netlingo [home, info]
28. Mainframe, mainframe, mainframe: CCI Computer [home, info]
29. mainframe: Computer Telephony & Electronics Dictionary and Glossary [home, info]
30. Mainframe: Tech Terms Computer Dictionary [home, info]
31. Mainframe: Linktionary Networking Glossary [home, info]
32. Mainframe: Karbo's Dictionary [home, info]
33. mainframe: Webopedia [home, info]
34. Mainframe: Data Formats and Their Sugggested File Extensions [home, info]
35. mainframe: I T Glossary [home, info]
36. Mainframe: Technopedia [home, info]
37. mainframe: Encyclopedia [home, info]

Medicine (1 matching dictionary)

38. mainframe: online medical dictionary [home, info]

Slang (1 matching dictionary)

39. mainframe: Urban Dictionary [home, info]

(Note: See mainframes for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (mainframe) ▸ noun:  a large digital computer serving 100-400 users and occupying a special air-conditioned room ▸ noun:  (computer science) the part of a computer (a microprocessor chip) that does most of the data processing; the CPU and the memory form the central part of a computer to which the peripherals are attached ▸ Also see mainframes ▸ Word origin ▸ Words similar to mainframe ▸ Usage examples for mainframe ▸ Idioms related to mainframe (New!) ▸ Popular adjectives describing mainframe ▸ Words that often appear near mainframe ▸ Rhymes of mainframe ▸ Invented words related to mainframe