Open the "System Settings" application from the Application Launcher or K menu.
Go to the "Window Management" section and select the "Window Rules" option.
In the "Window Rules" settings, select the application for which you want to disable the Meta key.
In the "Advanced" tab, scroll down to the "Shortcut Scopes" section.
Uncheck the "Global Shortcuts" checkbox. This will prevent any global shortcuts from being activated when the application is open.
In the same section, select the "Application Shortcuts" option. This will allow you to set custom shortcuts for the application.
To disable the Meta key, create a new shortcut by clicking the "+" button and selecting the "Meta" key as the shortcut. Then, select "Disabled" in the action list.