Teichos denotes a physical enclosing structure, whether breached for escape, fallen in siege, or surrounding a city.

The attested use denotes a physical enclosing or defensive structure. It is most often the city enclosure described with gates, foundations, measurement, building material, and adornment in Revelation 21:12, Revelation 21:14, Revelation 21:15, Revelation 21:17, Revelation 21:18, and Revelation 21:19; elsewhere it is the structure through which people are lowered to escape or which falls after marching around it.

1. Physical city enclosure or defensive barrier · dominant

   The singular forms identify the city's enclosing structure in Revelation 21:12, Revelation 21:14, Revelation 21:15, Revelation 21:17, Revelation 21:18, and Revelation 21:19: the APB renders a great high structure with gates, one with foundations, something measured, built of jasper, and associated with the city's foundations. The same concrete structure is the route through which a basket is lowered in Acts 9:25 and 2 Corinthians 11:33, while the plural form names Jericho's structures that fell in Hebrews 11:30.

   Revelation 21:12Revelation 21:14Revelation 21:15Revelation 21:17Acts 9:25Hebrews 11:30

In the Anselm Project Bible: Across the occurrences, the APB consistently presents the term with “wall” or “walls,” including a structure passed through in Acts 9:25 and a city feature in Revelation 21:12. These English terms reflect the clauses' presentation rather than a precise token-by-token rendering.