The word ἐκλεκτός can mean chosen, which is the Calvinists preferred definition, but it can also mean choicest as in best of its kind, excellent, favorite, etc. Like the choicest flowers.
That is why the Bible says Jesus Christ is elect (1 Peter 2:6 – elect/precious) and why it says the holy angels are elect (1 Tim. 5:21).
Paul addresses the Church, which is made up of “holy brethren” or “saints” as Paul calls them, as elect. Saint and Holy is the same Greek word – ἁγίοις.
A being who lives holy is elect. I am elect because I live holy. Calvinists don’t live holy, so they aren’t elect.