lustrum lustrousness • lust-stained · · · Info · Definitions · Characters · · lustrum · · Text Latin · · Script 7 · · Length 2 · · Syllables Definitions · · · (noun) a period of five years. · · Noun Definition 1 (noun) a ceremonial purification of the Roman population every five years following the census. · · Noun Definition 2 Characters · · l latin small letter l U+006C m latin small letter m U+006D 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