@PlaguescarredDoes a polearm master opportunity attack interrupt movement? The Polearm Master attack is in response to a creature entering your reach, so movement can be before and after it.

— Jeremy Crawford (@JeremyECrawford) August 22, 2014

@PlaguescarredIt doesnt interrupt movement being an opportunity attack? It is interrupting any further movement the target might have, after it is within your reach.

— Jeremy Crawford (@JeremyECrawford) August 22, 2014

@JeremyECrawford Ok so it works differently than a normal OA then, which interurpt before leaving your reach (otherwise target would be out)

— Yan ᵔ.ᵔ (@Plaguescarred) August 22, 2014

@JeremyECrawford And thus not interurpting creature 'entering your reach'', more reacting after they did.

— Yan ᵔ.ᵔ (@Plaguescarred) August 22, 2014

@PlaguescarredPolearm Master fluff say you can keep your enemies at bay with reach weapons is not really true if attack is when adjacent On the grid, the target is adjacent if you're using a quarterstaff, but 5 feet away with the other PM weapons.

— Jeremy Crawford (@JeremyECrawford) August 22, 2014

@Plaguescarred To be clear, the word "interrupt" has no special meaning in the game. It's used to clarify timing: "X happens before Y."

— Jeremy Crawford (@JeremyECrawford) August 22, 2014

@JeremyECrawford Why distance discrepency OA provoke base on weapon? You said earlier reach weapon dont increase if not attacking? #Confuse

— Yan ᵔ.ᵔ (@Plaguescarred) August 22, 2014

@JeremyECrawford Trying to get where yur coming from leave Reg OA with halberd when leaving your reach, creature is adjacent or 10 ft away?

— Yan ᵔ.ᵔ (@Plaguescarred) August 22, 2014

@Plaguescarred Yes, OA (an attack) is based on your reach with the weapon you're using.

— Jeremy Crawford (@JeremyECrawford) August 23, 2014