Galveston noun5 •Ellipsis of Galveston Island: an island of Galveston county, Galveston city, Texas, United States; an a barrier island separating in Galveston bay and the Gulf of Mexico, Atlantic Ocean. •Ellipsis of Port of Galveston: a port in Galveston island, Galveston city, Galveston county, Texas, United States. •Ellipsis of Galveston County: a county of Texas, United States. County seat: Galveston. •Ellipsis of Galveston Bay Area: a region of Texas, United States, surrounding Galveston Bay, on the Gulf of Mexico, Atlantic. •Ellipsis of Galveston Bay: a bay of the Gulf of Mexico, Atlantic in Texas, United States.