akin to a late verb alisgeo, "to pollute," denotes "a pollution, contamination," Act 15:20, "pollutions of idols," i.e., all the contaminating associations connected with idolatry including meats from sacrifices offered to idols.
Note: For miasma, AV, "pollutions," in 2Pe 2:20, see DEFILEMENT, B, No. 1.