Important: If you turned on iCloud for Pages (in System Preferences on your Mac), deleting a document from iCloud removes it from iCloud and from all other devices and Mac computers that use the same iCloud account.
If you don't know where the document is, locate it first.
Select the document, then do one of the following:
Drag the document to the Trash icon in the Dock.
Press Command-Delete on the keyboard.
To permanently remove the document from your computer, click the Finder icon in the Dock, then choose Finder > Empty Trash (from the Finder menu at the top of your screen).
If you don’t want to keep a new document you haven’t saved yet, close the document, then click Delete in the Save dialog that appears.
If you open an existing document, edit it, then decide you don’t want to keep any of your changes, you can revert the document to how it was when you opened it.