A suffix meaning 'street', 'quarter', or 'district', used in compounds (e.g., -gai in 繁華街 or 商店街).
駅前の商店街は毎日にぎやかだ。
The shopping street in front of the station is lively every day.
週末は繁華街に人が集まる。
People gather in the downtown area on weekends.
観光地の歓楽街には夜遅くまで明かりがついている。
The entertainment district in the tourist area stays lit until late at night.