Active:
How many frames a move remains able to hurt an opponent for.
ANTI-AIR:
An anti-air is performed when you land an attack on your opponent which takes them out of the air. (This is performed when your opponent jumps in on you).
Armor:
The word “Armor”, is used when describing certain moves in the game that allow you to tank 1 or multiple hits when getting attacked, before your character staggers.