1. motivation research.
2. Moral Re-Armament. Also,M.R.
milliroentgen; milliroentgens. Also,mr
Pronunciation: (mis'tur),[key] —pl.Messrs.Pronunciation: (mes'urz).[key] 1. mister: a title of respect prefixed to a man's name or position: Mr. Lawson; Mr. President. 2. a title prefixed to a mock surname that is used to represent possession of a particular attribute, identity, etc., esp. in an idealized or excessive way: Mr. Democrat; Mr. Perfect; Mr. Macho.