It doesn't stand for anything. It's the name of the headmaster of Hogwarts, Albus DUMBLEDORE.
Dumbledore is an early modern English word for Bumblebee.
I'm not sure what you mean by "what does dumbledore mean", but Albus Dumbledore is an old wizard, the headmaster of Hogwarts and a fighter for the light.
DA stands for Dumbledore's Army
Dumbledore's Army
She heard 'Dumbledore' was an old English word for 'bumblebee', and liked the idea of Dumbledore wandering around his office humming to himself.
Dumbledore says Harry's name three times. He whispers it once and then says it out loud. Harry just sits down, then Dumbledore says it again and Hermione pushes Harry to stand up.
Awesome (if you read the books)
Albus Dumbledore's brother is Aberforth Dumbledore.
Answer-D.A stands for Dumbledore's Army. And Defence Association as well.
Professor Dumbledore's full name is Albus Percival Wulfric Brian Dumbledore
Dumbledore, obviously.
The word for witness stand is "testimony stand" or "witness box."