it means a small forward whose main asset is defense like eddie would be a complete player but since he has great defensive skills and can play some 3 albeit mainly a 4 and later a 5, thus he is labeled as some a defensive three. A classic case would be scottie pippen during his bulls days, as much as i despise the man he did play excellent defense for a sf at that time.
I thought you were asking about the defensive 3 second call. If so, a defender cannot stand in the paint for 3 seconds unless he is guarding someone. If he is called for a defensive 3, its an automatic technical foul.
well i have no knowledge of his prior thread njrocket, but yes , eddie griffin, nj rockets definition does apply as well, just depends on what youre referring to