a balustraded or railed elevated platform projecting from the wall of a building.
2.
a gallery in a theater.
Origin: 1610–20; < Italian balcone balcony, floor-length window < Langobardic (compare Old High German balc(h)o, accusative singular balcon beam; see balk); sense extended from the beam over an aperture to the aperture itself
1610s, from It. balcone, from balco "scaffold" (from Langobardic *balko- "beam," cf. O.E. balca "beam, ridge;" see balk) + It. augmentative suffix -one. Till c.1825, regularly accented on the second syllable.