'Invincibly' definitions:

Definition of 'invincibly'

From: WordNet
adverb
In an invincible manner; "invincibly, the troops moved forward"

Definition of 'Invincibly'

From: GCIDE
  • Invincible \In*vin"ci*ble\, a. [L. invincibilis: cf. F. invincible. See In- not, and Vincible.] Incapable of being conquered, overcome, or subdued; unconquerable; insuperable; as, an invincible army, or obstacle. [1913 Webster]
  • Lead forth to battle these my sons Invincible. --Milton. -- {In*vin"ci*ble*ness}, n. -- {In*vin"ci*bly}, adv. [1913 Webster]