Communion – The Greek word is koinonia it’s used many times in the New Testament to focus on many things including the The communion table. It means to fellowship in a broad sense. To give and to share together in physical, spiritual, and intellectual things.
Gathering – The Greek word gathering we are using here is is ep-ee-soon-ag-o-gay’ it means a complete collection and it is only found in two places in the New Testament.
2nd Thessalonians 2:1-2 “Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him, That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.”
Hebrews 10:24-25 “And let us consider one another to provoke unto love and to good works: Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.”
In both of these verses you get a sense of coming together around Jesus. In Second Thessalonians we see the complete gathering of all the saints. Where as the Hebrews text shows the meaning of a complete unit ministering one to another in love. The size of the unit may vary but it’s complete, focusing on Jesus with many different parts working together. Like a car coming off of an assembly line it is one unit with all the parts working and in place for the use of the driver.