first moment first-mining • first mortgage · · · Info · Definitions · Synonyms · Characters · · first moment · · Text Common · · Latin · · Scripts 12 · · Length 3 · · Syllables Definitions · · · (noun) the sum of the values of a random variable divided by the number of values. Synonyms: arithmetic mean, first moment, expectation, expected value. · · Noun Definition 1 Synonyms · · · arithmetic mean · · Synonym 1 expectation · · Synonym 2 expected value · · Synonym 3 Characters · · space U+0020 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074