MM noun 14 noun14 •Abbreviation of million. •Initialism of market maker. •Initialism of man-month. •Initialism of Master of Music. •Initialism of mile marker. •Initialism of mintmark. •Initialism of memory management. •Initialism of moving magnet, a type of phono cartridge. •Initialism of Master Mason. •Initialism of Master of Management. •Initialism of mathematical morphology. •Initialism of middle marker. •Initialism of maritime mobile. •Initialism of mounted mint.