I have three Biblical Greek-English Dictionaries (including "Strong's"), and they all show "church" as one of the translations, and that is also obviously what the translators of most of the English Translations of the Bible chose to use as the most accurate, precise translation of that word in those references, as I stated in my original post.
(For an online example, check out this definition at
http://www.greek-dictionary.net/ekklēsia which contains the following translation.)
Greek transliteration: ekklēsia
Transliteration (simplified): ekklesia
Strong's number: 1577
GK number: 1711
Frequency in New Testament: 114
Morphology of Biblical Greek tag: n-1a
Gloss:
church, congregation, assembly; ...