The close tag with no summary wiki on Stack Overflow is linked to (
1,232 / 1,164 / 1,052 / 996 / 705 / 652 / 474 / 335 ) 178 questions. Close is a general term, and it is not specific to any technology term that it can stand on its own.
Most questions tagged with this are related to the browser close event or function, close icon, close server etc. Indeed it is not correct tag to filter the question.
Can we burninate it?
The somewhat related closing has about 160-odd questions and no wiki entry. It looks like another plausible candidate for burnination.