significantly

from WordNet (r) 3.0 (2006)

significantly
    adv 1: in a statistically significant way; "the two groups
           differed significantly"
    2: in a significant manner; "our budget will be significantly
       affected by these new cuts" [ant: {insignificantly}]
    3: 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: {importantly},
       {significantly}]

from The Collaborative International Dictionary of English v.0.48

Significantly \Sig*nif"i*cant*ly\, adv.
   In a significant manner.
   [1913 Webster]