mR -abbr

  1. milliroentgen

Mr. ['mis-tər, in rapid speech esp in sense 2 (,)mis(t)] -n

  1. used as a conventional title of courtesy except when usage requires the substitution of a title of rank or an honorific or professional title before a man's surname
    • spoke to Mr. Doe
  2. used in direct address as a conventional title of respect before a man's title of office
    • may I ask one more question, Mr. President
  3. used before the name of a place, profession, or activity or before an epithet (as clever ) to form a title applied to a male viewed as representative of the thing indicated
    • Mr. Baseball

Mr. Charlie [-'chär-lē] -n

  1. a white man : white people

MRE -abbr

  1. meals ready to eat

MRI [,em-(,)är-'ī] -n

  1. magnetic resonance imaging
  2. the procedure in which magnetic resonance imaging is used

mri·dan·ga [mri-'däŋ-gə, ,mər-i-] -n

  1. a drum of India that is shaped like an elongated barrel and has tuned heads of different diameters

mRNA -abbr

  1. messenger RNA

Mr. Right -n

  1. a man who would make the perfect husband

Mrs. ['mi-səz, -səs, esp Southern 'mi-zəz, -zəs, or in rapid speech in sense 1 (,)miz, or before given names (,)mis] -n

  1. used as a conventional title of courtesy except when usage requires the substitution of a title of rank or an honorific or professional title before a married woman's surname
    • spoke to Mrs. Doe
  2. used before the name of a place (as a country or city) or of a profession or activity (as a sport) or before some epithet (as clever ) to form a title applied to a married woman viewed or recognized as representative of the thing indicated
    • Mrs. Golf
  3. wife
    • left with the Mrs.

MRSA [,em-,är-,es-'ā, 'mər-sə] -n

  1. any of several strains of a bacterium ( Staphylococcus aureus) that are resistant to methicillin and related antibiotics (as penicillin) and may cause usu. mild infections of the skin or sometimes more severe infections (as of the blood or lungs) esp. in hospitalized or immunocompromised individuals

Mrs. Grun·dy [-'grən-dē] -n

  1. one marked by prudish conventionality in personal conduct