The Collaborative International Dictionary of English v.0.48:

Imaginative \Im*ag"i*na*tive\, a. [F. imaginatif.]
   1. Proceeding from, and characterized by, the imagination,
      generally in the highest sense of the word.
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            In all the higher departments of imaginative art,
            nature still constitutes an important element.
                                                  --Mure.
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   2. Given to imagining; full of images, fancies, etc.; having
      a quick imagination; conceptive; creative.
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            Milton had a highly imaginative, Cowley a very
            fanciful mind.                        --Coleridge.
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   3. Unreasonably suspicious; jealous. [Obs.] --Chaucer. --
      Im*ag"i*na*tive*ly, adv. -- Im*ag"i*na*tive*ness, n.
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WordNet (r) 3.0 (2006):

imaginatively
    adv 1: with imagination; "the room was decorated very
           imaginatively" [ant: unimaginatively]