Intracoastal Waterway: Meaning and Definition of

In'tra•coast'al Wa'terway

1. a mostly inland water route, partly natural and partly artificial, extending 1550 mi. (2500 km) along the Atlantic coast from Boston to Florida Bayand 1116 mi. (1800 km) along the Gulf coast from Carrabelle, Fla., to Brownsville, Tex.constructed to protect small craft from the hazards of the open sea.