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

ideally \ide"ally\, adv.
   in an ideal manner; by means of ideals; mentally.
   1913 webster

[2] : WordNet (r) 2.0

ideally
     adv : in an ideal manner; "ideally, this will remove all problems"

[3] : Moby Thesaurus II by Grady Ward, 1.0

23 moby thesaurus words for "ideally":
   absolutely, at best, completely, entirely, faultlessly, flawlessly,
   fully, hypothetically, immaculately, impeccably, in idea,
   in the abstract, in theory, infallibly, just right, on paper,
   perfectly, purely, spotlessly, theoretically, thoroughly, totally,
   wholly

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