"a wall," especially one around a town, is used (a) literally, Act 9:25, 2Co 11:33, Heb 11:30; (b) figuratively, of the "wall" of the heavenly city, Rev 21:12, Rev 1:21-15, Rev 1:21-19.
<2,,5109, toichos>
"a wall," especially of a house, is used figuratively in Act 23:3, "(thou whited) wall."
<3,,3320, mesotoichon>
"a partition wall" (mesos, "middle," and No. 2), occurs in Eph 2:14, figuratively of the separation of Gentile from Jew in their unregenerate state, a partition demolished by the Cross for both on acceptance of the Gospel. Cp. PARTITION.