Search Result for "momentously": 
Wordnet 3.0

ADVERB (1)

1. in a momentous way; 



The Collaborative International Dictionary of English v.0.48:

Momentous \Mo*men"tous\, a. [Cf. L. momentosus rapid,
   momentary.]
   Of moment or consequence; very important; weighty; as, a
   momentous decision; momentous affairs. -- Mo*men"tous*ly,
   adv. -- Mo*men"tous*ness, n.
   [1913 Webster]


WordNet (r) 3.0 (2006):

momentously
    adv 1: in a momentous way