What it means

1. adjective (of a day of the week) nearest (or nearest but one) after the present moment
   “not this Saturday, next Saturday”
2. adjective immediately following in time or order
   “the following day”
3. adjective nearest in space or position
   “had adjacent rooms”
4. adjective (of elected officers) elected but not yet serving
   “our next president”
5. adverb at the time or occasion immediately following
   “next the doctor examined his back”