the lowest balcony or forward part of such a balcony in a theater.
2.
a low story between two other stories of greater height in a building, especially when the low story and the one beneath it form part of one composition; an entresol.
Origin: 1705–15; < French < Italianmezzanino, equivalent to mezzan(o) middle (< Latinmediānusmedian) + -ino diminutive suffix
1711, "a low story between two tall ones in a building," from Fr., from It. mezzanino, from mezzano "middle," from L. medianus "of the middle," from medius (see medial). Sense of "lowest balcony in a theater" first recorded 1927.