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

immensely \immense"ly\, adv.
   in immense manner or degree.
   1913 webster

[2] : WordNet (r) 2.0

immensely
     adv : to an exceedingly great extent or degree; "he had vastly
           overestimated his resources"; "was immensely more
           important to the project as a scientist than as an
           administrator" syn: vastly
see also:
vastly 

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

45 moby thesaurus words for "immensely":
   ad infinitum, boundlessly, colossally, divinely, endlessly,
   enormously, eternally, ever, excessively, exquisitely, extremely,
   forever, gigantically, gloriously, hugely, illimitably,
   immeasurably, in perpetuity, incalculably, incomprehensibly,
   infinitely, innumerably, inordinately, interminably, limitlessly,
   magnificently, marvelously, measurelessly, over, overfull, overly,
   overmuch, prodigiously, stupendously, superbly, terrifically,
   titanically, to infinity, too, tremendously, unduly, vastly,
   without end, without limit, wonderfully

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