1. Noun

   M; m

2. metre; meter

   usu. read メートル

3. masochist; masochistic

   see Ｓ

4. male; man

5. medium

6. one thousand (Roman numeral)

7. magnitude

8. mass

9. Mach

10. milli-; m

11. mega-; M

12. magenta

13. money

    SlangArchaic

Also written ｍ【エム】emu