abbreviation of Gosudarstvenny Universalny Magazin (Russian: "State Department Store")
Largest department store in Russia.
Situated in Moscow's Red Square, it occupies a huge, ornate building (constructed 1889–93) that once housed more than 1,000 shops. GUM now includes about 150 shops selling food, clothing, home appliances, watches and cameras, and many other goods. It functions more like a Western-style shopping mall than a department store and is a popular tourist attraction.