supplementation supplementary • supplementer · · · Info · Definitions · Synonyms · Characters · · supplementation · · Text Latin · · Script 15 · · Length Definitions · · · (noun) a quantity added (e.g. to make up for a deficiency). Synonyms: supplement. · · Noun Definition 1 (noun) the act of supplementing. Synonyms: subjunction, subjoining. · · Noun Definition 2 Synonyms · · · supplement · · Synonym 1 subjunction · · Synonym 2 subjoining · · Synonym 3 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075