City - Vine's Expository Dictionary of New Testament Words
City[ 1,,G4172, polis ]
primarily a town enclosed with a wall" (perhaps from a root ple---, signifying "fullness," whence also the Latin pleo, "to fill," Eng., "polite, polish, politic, etc."), is used also of the heavenly Jerusalem, the abode and community of the redeemed, Hebrews 11:10, Hebrews 11:16; Hebrews 12:22; Hebrews 13:14. In the Apocalypse it signifies the visible capital of the Heavenly Kingdom, as destined to descend to earth in a coming age, e.g., Revelation 3:12; Revelation 21:2, Revelation 21:14, Revelation 21:19. By metonymy the word stands for the inhabitants, as in the English use, e.g., Matthew 8:34; Matthew 12:25; Matthew 21:10; Mark 1:33; Acts 13:44.
Note: In Acts 16:13, the most authentic mss. have pule, "gate," RV, "without the gate."