The biblical definition of church I saw is “Any time 2 or more come together in my name, that is church”
Well, if a "definition" is necessary this is much closer than the Roman monstrosity. But, as I mentioned in P#112, there is no such word as "church". And, in reality, the Greek is very fluid with the use of the term describing assemblies meeting in homes, market places, and river sides. So, you are correct.