A bay, gulf, or inlet: a coastal indentation of the sea or large lake (also used as a suffix in place names).
東京湾は日本で最も有名な湾の一つだ。
Tokyo Bay is one of the most famous bays in Japan.
湾の景色は波が穏やかで美しかった。
The bay's scenery was beautiful with calm waves.
入り江と湾は似ているが、湾の方が広いことが多い。
An inlet and a bay are similar, but a bay is often larger.