The Wine documentation admits that it is emulating the Windows API.
https://wiki.winehq.org/Wine_Developer%27s_Guide/Architectur...
Of course there is no hardware emulation, so all Windows binary code is running natively with no performance drop. That's why it was called WINE. But still there are two meanings of the word. Hardware emulation or OS emulation at API level.
In the context of computers, “emulation” has a specific meaning and one which isn’t applicable to WINE.
The Wine documentation admits that it is emulating the Windows API.
https://wiki.winehq.org/Wine_Developer%27s_Guide/Architectur...
Of course there is no hardware emulation, so all Windows binary code is running natively with no performance drop. That's why it was called WINE. But still there are two meanings of the word. Hardware emulation or OS emulation at API level.