Basically I consider a super team a team that would be considered among the best of all time that has multiple first ballot HOFers in their prime.
I'd say the first super team that involved a core where not everyone was drafted was the 69 Lakers, which added Wilt to Baylor and West. I mean the 68 Lakers lost to the Celtics in the Finals and then they added Wilt (only to lose again to the Celtics in 69). The Celtics of the 60's were also obviously a super team, but they drafted all of the main pieces. The Sixers of the 60's were a great team with Wilt, Greer, and Cunningham, and despite that 68 win season and title, I wouldn't call them a super team as only Wilt really had the cache. The 70 Bucks led by Kareem added Oscar and won the 71 title, but I struggle to put them as a super team with really just 2 HOFers (Kareem and Oscar).
The Lakers, Celtics, and Sixers in the 80's were all super teams. The Pistons are arguable as they had 3 HOFers, but I wouldn't ever consider them in the greatest of all time discussion. The Bulls were likely a super team with the best player and a top 5 player of the day on the same team (which is where a team like the 70 Bucks can enter the discussion). That also creates a bit of a gray area on the early 00's Lakers and the Spurs.
The Celtics with KG, PP, and Ray probably have to be considered a super team. The Heat were. The Warriors are. The Cavs are in that gray area with the Bucks, 00 Lakers, Pistons, Spurs. Great teams, title winners, but just not sure they hit that super team level.