4 ms·MM means mil mil or 1000 1000. Its the roman numeral for 1,000,000 and typically used today in finance.by Itsdijital 6y agoMM means mil mil or 1000 1000. Its the roman numeral for 1,000,000 and typically used today in finance.sorenjan 6y agoMM is 2000 in roman numerals though. It's additive, not multiplicative.aeternum 6y agoIn finance mm is generally accepted to mean million.