pontoon

1. n. A wooden flat-bottomed boat, a metallic cylinder, or a frame covered with canvas, India rubber, etc., forming a portable float, used in building bridges quickly for the passage of troops. Source: opted

2. n. A low, flat vessel, resembling a barge, furnished with cranes, capstans, and other machinery, used in careening ships, raising weights, drawing piles, etc., chiefly in the Mediterranean; a lighter. Source: opted

3. n. (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge Source: wordnet

4. n. a float supporting a seaplane Source: wordnet

5. 1. (Mil.) A wooden flat-bottomed boat, a metallic cylinder, or a frame covered with canvas, India rubber, etc., forming a portable float, used in building bridges quickly for the passage of troops. 2. (Naut.) A low, flat vessel, resembling a barge, furnished with cranes, capstans, and other machinery, used in careening ships, raising weights, drawing piles, etc., chiefly in the Mediterranean; a lighter. Pontoon bridge, a bridge formed with pontoons. -- Pontoon train, the carriages of the pontoons, and the materials they carry for making a pontoon bridge. Note: The French spelling ponton often appears in scientific works, but pontoon is more common form. Source: webster

6. A wooden flat-bottomed boat, a metallic cylinder, or a framecovered with canvas, India rubber, etc., forming a portable float,used in building bridges quickly for the passage of troops. Source: adambom

7. n:100 n. (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge n. a float supporting a seaplane Source: ecdict

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