Holman Bible Dictionary
In scriptural language a wall is a symbol of salvation (Isaiah 26:1; Isa, Isaiah 60:18 ), of the protection of God (Zechariah 2:5 ), of those who afford protection (1 Samuel 25:16; Isaiah 2:15 ), and of wealth of the rich in their own conceit (Proverbs 18:11 ). A “brazen wall” is symbolic of prophets and their testimony against the wicked (Jeremiah 15:20 ). The “wall of partition” (Ephesians 2:14 ) represented Temple worship and Jewish practice separating Jew from Gentile.
These dictionary topics are from the Holman Bible Dictionary, published by Broadman & Holman, 1991. All rights reserved. Used by permission of Broadman & Holman.
Butler, Trent C. Editor. Entry for 'Walls'. Holman Bible Dictionary. https://www.studylight.org/dictionaries/eng/hbd/w/walls.html. 1991.