- 大西洋 dàxīyáng Atlantic Oceanthe Atlantic Ocean; one of the world's major oceans located between the Americas to the west and Europe and Africa to the east
- 北大西洋 běidàxīyáng North Atlanticthe North Atlantic Ocean
- 大西北 dàxīběi Northwest Chinathe vast region of Northwest China, comprising Shaanxi, Gansu, Ningxia, Qinghai, Xinjiang, and parts of western Inner Mongolia
- 北大西洋集团 běidàxīyángjítuán NATONorth Atlantic Treaty Organization
- 大西国 dàxīguó AtlantisThe legendary island nation of Atlantis mentioned in the works of Plato; also known as [[阿特兰蒂斯|阿特蘭蒂斯|a1 te4 lan2 di4 si1]]
- 大西庇阿 dàxībì'ā Scipio AfricanusScipio Africanus (235-183 BC), Roman general and statesman
- 大西洋中脊 dàxīyángzhōngjǐ Mid-Atlantic Ridgethe mid-ocean ridge located along the floor of the Atlantic Ocean
- 大西洋国 dàxīyángguó Portugalhistorical name for [[葡萄牙|葡萄牙|pu2 tao2 ya2]] used during the Qing dynasty
- 中大西洋脊 zhōngdàxīyángjǐ mid-Atlantic ridgethe mid-Atlantic ridge
- 大西洋洋中脊 dàxīyángyángzhōngjǐ Mid-Atlantic RidgeThe Mid-Atlantic Ridge, a mid-ocean ridge located along the floor of the Atlantic Ocean
- 北大西洋公约组织 běidàxīyánggōngyuēzǔzhī NATONorth Atlantic Treaty Organization; the military alliance established in 1949 and headquartered in Brussels
- 北大西洋联盟 běidàxīyángliánméng NATONorth Atlantic Treaty Organization; an intergovernmental military alliance between North American and European countries
