drainboard drainage • draine · · · Info · Definitions · Synonyms · Characters · · drainboard · · Text Latin · · Script 10 · · Length Definitions · · · (noun) a board beside a kitchen sink and inclined to drain into the sink. Synonyms: draining board. · · Noun Definition 1 Synonyms · · · draining board · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 d latin small letter d U+0064 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072