Source : Webster's Revised Unabridged Dictionary (1913)

Am \Am\ [AS. am, eom, akin to Gothic im, Icel. em, Olr. am,
   Lith. esmi, L. sum., Gr. ?, Zend ahmi, Skr. asmi, fr. a root
   as to be. ?. See {Are}, and cf. {Be}, {Was}.]
   The first person singular of the verb be, in the indicative
   mode, present tense. See {Be}.

         God said unto Moses, I am that am.       --Exod. iii.
                                                  14.

Source : WordNet®

Am
     n 1: a radioactive transuranic metallic element; discovered by
          bombarding uranium with helium atoms [syn: {americium},
          {atomic number 95}]
     2: a master's degree in arts and sciences [syn: {Master of Arts},
         {MA}, {Artium Magister}]
     3: modulation of the amplitude of the (radio) carrier wave
        [syn: {amplitude modulation}]

Source : Free On-Line Dictionary of Computing

am
     
         The {country code} for Armenia.
     
        Used for the {vanity domain} "i.am".
     
        (1999-01-27)

AM
     
        1.  {Amplitude Modulation}.
     
        2.  A program by {Doug Lenat} to
        discover concepts in elementary mathematics.  AM was written
        in 1976 in {Interlisp}.  From 100 fundamental concepts and
        about 250 {heuristics} it discovered several important
        mathematical concepts including subsets, disjoint sets, sets
        with the same number of elements, and numbers.  It worked by
        filling slots in {frames} maintaining an agenda of
        resource-limited prioritised tasks.
     
        AM's successor was {Eurisko}.
     
        {(http://homepages.enterprise.net/hibou/aicourse/lenat.txt)}.
     
        (1999-04-19)