How to move music to Library

I have a music library and various songs etc. scattered in places among drives - I also note that some songs are noted as not in the Music Library [they should be since I keep all songs there, not sure where they went] - I'd like to gather up all my music [easy enough to do in Spotlight] and MOVE all the music to my iTunes Library -- not copy it!!! I don't want other copies, I want ONE set of music moved into my Library and then I can clean it out of dupes or items that dont' play.

How do I MOVE and not copy music into my library.