definition seabee
Freebase(0.00 / 0 votes)Rate this definition: Seabee. A Seabee is a member of the United States Navy Construction Battalion. The word Seabee is a proper noun that comes from initials CB. The Seabees have a history of building bases, bulldozing and paving thousands of miles of roadway and airstrips, and accomplishing a myriad of other construction projects in a wide variety of military theaters dating back to World War II.