millisecond millipoise • millistere · · · Info · Definitions · Synonyms · Characters · · millisecond · · Text Latin · · Script 11 · · Length Definitions · · · (noun) one thousandth (10^-3) of a second. Synonyms: msec. · · Noun Definition 1 Synonyms · · · msec · · Synonym 1 Characters · · c latin small letter c U+0063 d latin small letter d U+0064 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 s latin small letter s U+0073