 GEOG: When Harry arrives at Hogwarts, Professor McGonagall announces  that the Sorting Ceremony will begin "momentarily". In UK English,  momentarily means "for a moment" (i.e. briefly), and a Scottish  witch as pedantic and precise as McGonagall would never use the  American meaning of the word ("in a moment" or "soon"), even though  the American meaning might be well understood. Then again, given  that the otherwise equally pedantic Snape says "less" when he means  "fewer", it could just be that the teaching staffs use of English  is just as sloppy as it is in schools all over the muggle world.