centerboard centerable • centered · · · Info · Definitions · Synonyms · Characters · · centerboard · · Text Latin · · Script 11 · · Length Definitions · · · (noun) a retractable fin keel used on sailboats to prevent drifting to leeward. Synonyms: centreboard, drop keel, sliding keel. · · Noun Definition 1 Synonyms · · · centreboard · · Synonym 1 drop keel · · Synonym 2 sliding keel · · Synonym 3 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074