[familyop]

importantly

From The Collaborative International Dictionary of English v.0.48:

  Importantly \Im*por"tant*ly\, adv.
     In an important manner.
     [1913 Webster]

From WordNet (r) 2.0:

  importantly
       adv 1: in an important way or to an important degree; "more
              importantly, Weber held that the manifold meaning
              attached to the event by the social scientist could
              alter his definition of the concrete event itself"
              [syn: significantly]
       2: in an important way; "for centuries jellies have figured
          importantly among English desserts, particularly upon
          festive occasion"

[GretchenM]

When I was a youngster, and doing dictionary exercises, we were never allowed to define a word by using the root of the word, or any form of the word in the definition. For example, we could not use “important” to define “importantly.”