'Gravely' definitions:

Definition of 'gravely'

From: WordNet
adverb
In a grave and sober manner; "he walked soberly toward the altar" [syn: gravely, soberly, staidly]
adverb
To a severe or serious degree; "fingers so badly frozen they had to be amputated"; "badly injured"; "a severely impaired heart"; "is gravely ill"; "was seriously ill" [syn: badly, severely, gravely, seriously]

Definition of 'Gravely'

From: GCIDE
  • Gravely \Grave"ly\, adv. In a grave manner. [1913 Webster]