SEASHORE Meaning of SEASHORE in English ˈ ̷ ̷ˌ ̷ ̷ noun 1. : land adjacent to the sea : seacoast , seabeach2. : all the ground between the ordinary high-water and low-water marks : foreshore Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012