Definition of Unix™ noun from the Oxford Advanced Learner's Dictionary

 

Unix™

 noun
noun
BrE BrE//ˈjuːnɪks//
 
; NAmE NAmE//ˈjuːnɪks//
 
[uncountable](computing)
 
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an operating system which can be used by many people at the same time Word Origin 1970s: from uni- ‘one’ + a respelling of -ics, on the pattern of an earlier less compact system called Multics.
See the Oxford Advanced American Dictionary entry: Unix™