Yes, I'm also going by the definition of the Greek ekklesia so that is fine. I read your comments as asserting that any meeting of believers, including just two believers, constitute an ekklesia, but only when they meet. Individually they are not members of an ekklesia, only when there are at least two of them together. That is an interesting doctrine of ecclesiology; it sounds like you gave that some thought.
If that is indeed what you meant, the structure of this scripture seems odd; why write that "if" (Strong's defines it only as "if, in case") ? Where else, by definition, could a "called out assembly" meet if not in "one place ?" Ref: 1 Cor 14:23
If therefore the whole church be come together into one place, and all speak with tongues, and there come in those that are unlearned, or unbelievers, will they not say that ye are mad ?
Paul is talking to the assembly at Corinth. If the whole assembly at Corinth come together in one place. It’s referring to those who are called out in that one place. I don’t suppose the Catholic mindset can comprehend the concept however.