Where did you get this definition? Is it just your guess or did you actually see this at some official website? I was under the impression that both have to be filed together in order to be labeled as concurrent as there was compleltely different filing and labeling procedure. I don't where I read this, but there was an official INS document in this forum floating around that explained the procedures right from receipt of applications to adjudications.c514468 said:I think if you file your I-485 before your I-140 is approved, it is considered as concurrent filing. Before this new regulation, you had to wait for the I-140 approval in order to be able to file I-485.