The Collaborative International Dictionary
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.
Lead forth to battle these my sons
Invincible.
--Milton.
-- In*vin"ci*ble*ness, n. -- In*vin"ci*bly, adv.
Wiktionary
adv. In an invincible manner; unconquerably; insuperably.
WordNet
adv. in an invincible manner; "invincibly, the troops moved forward"
Usage examples of "invincibly".
Any bloody fool of an amphibious parrot or disgraceful three-winged stoat had as much chance of survival, of success, as the slickest, the niftiest, the most singleminded dreck-eating ratlet or invincibly carapaced predator.
But this Arret endangers the transferring to Great Britain every man of them who is not invincibly attached to his native soil.
Elephants were useful in battle in those days -- a kind of early-model tank -- but they were handy also for terrifying the civilian populace: bizarre colossal smelly critters trampling invincibly through the suburbs, flapping their vast ears and trumpeting awesome cries of doom and burying your rose bushes under mountainous turds.
It was the first time he had felt so invincibly that this world must at last see its end and that a new Jerusalem must rise from the tombs.
Looking down at the unconscious face, it seems to Byron as though the whole man were fleeing away from the nose which holds invincibly to something yet of pride and courage above the sluttishness of vanquishment like a forgotten flag above a ruined fortress.
Taking a tip from the Painted Ladies, he had split into a thousand units, volplaning away on the breeze, safely, invincibly, lost among the crowd of bright insects.