M’- prefix a variant of Mac- Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014M, m (?m) n., pl. Ms M’s, ms m’s. 1. the 13th letter of the English alphabet, a consonant. 2. any spoken sound represented by this letter. 3. something shaped like an M. 4. a written or printed representation of the letter M or m. 5. Print. em. M 1. mach. 2. major. 3. married. 4. Medieval. 5. medium. 6. mega-. 7. Middle. M Symbol. 1. the 13th in order or in a series. 2. the Roman numeral for 1000. 3. magnetization. 4. methionine. 5. minim. m 1. mass. 2. medieval. 3. medium. 4. meter. 5. middle. 6. minor. m- 1. meta-. 2. (referring esp. to the use of wireless electronic devices) mobile: m-commerce; m-business. M’- var. of Mac-. M. 1. majesty. 2. markka. 3. marquis. 4. measure. 5. medicine. 6. medium. 7. meridian. 8. noon. [