Definition of M in English:

M

  • 1(on scorecards) maiden over(s).

  • 2Male.

  • 3Malta (international vehicle registration).

  • 4Medium (as a clothes size).

  • 5in combination (in units of measurement) mega-

    ‘8 Mbytes of memory’
  • 6Astronomy
    Messier (catalogue of nebulae)

    ‘the galaxy M33’
  • 7Chemistry
    (with reference to solutions) molar.

    ‘0.15 M NaCl solution’
  • 8Monsieur.

    ‘M Chirac’
  • 9(in UK road designations) motorway.

    ‘the M25’
  • 10Used with following numeral in measures of money supply.

    ‘broad money, M3, grew by an annualized 9.7 per cent’

Physics
  • Mutual inductance.

Pronunciation

M

/ɛm/