IPA: //ˈmʌltiˌjuːzər//
KK: /ˈmʌltiˌjuːzər/
Relating to a system or product that allows multiple people to use it at the same time.
The multiuser system enables several employees to access the database simultaneously.
Multiuser → It is formed from "multi-" (from Latin "multus", meaning many) and "user" (from Old French "user", meaning to use). The word "multiuser" refers to a system or environment that allows many users to access or use it simultaneously.
Think of 'many' ('multi-') people 'using' ('user') something at the same time — that's what multiuser means.