πλεονεξία names greed, covetousness, grasping desire, the appetite that wants more than God has given and more than love permits. In Scripture it is not a minor personality flaw or a harmless ambition. Jesus warns against every form of it because life does not consist in abundance of possessions. Paul places it among sins that defile, among practices unfitting for saints, and in Colossians 3:5 he calls it idolatry. The word exposes desire that has become worship.
Colossians puts πλεονεξία inside the mortification list: sexual immorality, impurity, passion, evil desire, and greed. That placement matters. Greed is not merely financial mismanagement. It is a disordered hunger that can attach itself to money, status, control, pleasure, security, ministry success, or recognition. Paul calls it idolatry because the grasping heart treats something created as the source of life, identity, safety, or worth. The cure is not less desire in the abstract, but a new life hidden with Christ and a renewed self being conformed to the Creator's image.
Lexical sourceCanonical parallelBook contextPastoral application