SEASIDE Meaning of SEASIDE in English /see"suyd'/ , n.1. the land along the sea; seacoast. adj.2. situated on or pertaining to the seaside. [ 1175-1225; ME seeside. See SEA, SIDE 1 ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012