How to disable peek on go to definition

Check the Visual Studio options:

• Disable "Control click shows definitions in Peek" option in: Options→Productivity Power Tools→Other Extentions.
• Disable "Allow new files to be opened in preview tab" in: Options→Environment→Tabs and Windows.
• Ensure you have F12 key assigned to Edit.GoToDefinition per Global scope in: Options→Environment→Keyboard.

UPDATE: It works for Visual Studio 2017 as well.

In visual studio 2017, professional edition: