[1] : The Collaborative International Dictionary of English v.0.48

imam \imam"\, iman \iman"\, imaum \imaum"\, n. ar. im=am.
   1. among the mohammedans, a minister or priest who performs
      the regular service of the mosque.
      1913 webster

   2. a mohammedan prince who, as a successor of mohammed,
      unites in his person supreme spiritual and temporal power.
      1913 webster

[2] : WordNet (r) 2.0

imaum
     n : islam the man who leads prayers in a mosque; for shiites
         an imam is a recognized authority on islamic theology and
         law and a spiritual guide syn: imam
see also:
imam 

Imaum >> I Words
Imaum, definition of term: Imaum
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