Not so. I have defined it according to the context of the text. Paul is speaking about partnering together in ministry.
2Co 6:3 We put no obstacle in anyone's way, so that no fault may be found with our ministry,
2Co 6:4 but as servants of God we commend ourselves in every way: by great endurance, in afflictions, hardships, calamities,
2Co 6:5 beatings, imprisonments, riots, labors, sleepless nights, hunger;
2Co 6:6 by purity, knowledge, patience, kindness, the Holy Spirit, genuine love;
2Co 6:7 by truthful speech, and the power of God; with the weapons of righteousness for the right hand and for the left;
2Co 6:8 through honor and dishonor, through slander and praise. We are treated as impostors, and yet are true;
Paul is saying "Don't partner with unbelievers in ministry, cause you will destroy your ministry...thats why he goes on to say,
2Co 6:17 Therefore go out from their midst, and be separate from them, says the Lord, and touch no unclean thing; then I will welcome you,
You do know what "separate" means, don't you?