海口 Traditional form: 海口 Pinyin (reading): hǎikǒu Definitions: estuary coastal inlet river mouth seaport see also 誇海口/夸海口 (kuāhǎikǒu) Characters: 海 - sea, ocean; maritime 口 - mouth; entrance, gate, opening Traditional characters: 海 - sea, ocean; maritime 口 - mouth; entrance, gate, opening