pontoon pontonier • pontooneer · · · Info · Definitions · Characters · · pontoon · · Text Latin · · Script 7 · · Length Definitions · · · (noun) (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge. · · Noun Definition 1 (noun) a float supporting a seaplane. · · Noun Definition 2 Characters · · n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 t latin small letter t U+0074