dome. 1  a vault, having a circular plan and usually in the form of a portion of a sphere, so constructed as to exert an equal thrust in all directions. 2  a domical roof or ceiling. 3  a polygonal vault, ceiling, or roof.
Egyptian Arabic is used in most social situations, with Modern Standard and Classical Arabic generally only being used in writing and in highly religious and/or formal situations. However, within Egyptian Arabic, there is a wide range of variation.
Arabic is the most widely spoken language in Cairo, although many educated Cairenes speak English, Italian or French. Egypt has a very young population. 75% of Egypt ians are under the age of 25 and just 3% are over the age of 65, which makes it one of the youngest countries. Cairo has an older population compared to the national average, however, with 36% of the population under 36%.