surtax sursumversion • surtitle · · · Info · Definitions · Synonyms · Characters · · surtax · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) an additional tax on certain kinds of income that has already been taxed. Synonyms: supertax. · · Noun Definition 1 (verb) levy an extra tax on. Example: "Surtax luxury items that cost more than $1,000." · · Verb Definition 1 Synonyms · · · supertax · · Synonym 1 Characters · · a latin small letter a U+0061 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 x latin small letter x U+0078