ἐκκλησία
ekklēsía · noun · “church, assembly”
Ekklēsia means assembly or gathering — the New Testament word for “church.” It is not a building but the people God has called out to be his own.
Ekklēsia simply meant a public assembly in the Greek world. The New Testament takes it and uses it for the gathering of God’s people — first local, then universal, called out by Christ to belong to him.
This is why “church” in the Bible is never a building. It is people: those Jesus is building, those gathered in his name, those the Spirit indwells together. The doors of the ekklēsia stand open to anyone who comes to Jesus.
Definition: a calling out, i.e. (concretely) a popular meeting, especially a religious congregation (Jewish synagogue, or Christian community of members on earth or saints in heaven or both)
KJV usage: assembly, church
Reference gloss from Strong's Concordance (1890, public domain).
Original BibleDawn word study. Original-language data and the public-domain Strong's (1890) gloss are referenced; see sources.