We found one dictionary that defines the word multi-user operating system:

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1. Multi-user operating system: Encyclopedia

▸ Words similar to multi-user operating system ▸ Usage examples for multi-user operating system ▸ Idioms related to multi-user operating system ▸ Wikipedia articles (New!) ▸ Words that often appear near multi-user operating system ▸ Rhymes of multi-user operating system ▸ Invented words related to multi-user operating system