1) The sixth of seven planned installments in the Harry Potter series of books.
2) A character in the Harry Potter universe.
2) "Can you believe (blank) was revealed to be the half-blood prince?"
FRiend 2: Well Half BLood PRince is coming out so you can keep your pants on.
2)title of the long awaited 6th harry potter book by j.k rowling, released on the 16th of july 2005.
2) "omg half blood prince is out in 3 days!"