1.Definition: (of a day of the week) nearest (or nearest but one) after the present moment
"Not this Saturday, next Saturday", "On Tuesday next"
2.Definition: (of elected officers) elected but not yet serving
"Our next president"
3.Definition: immediately following in time or order
"Next in line", "The next president", "The next item on the list"
4.Definition: nearest in space or position; immediately adjoining without intervening space
"In the next room", "The person sitting next to me"