'Invincible' definitions:

Definition of 'invincible'

From: WordNet
adjective
Incapable of being overcome or subdued; "an invincible army"; "her invincible spirit" [syn: invincible, unbeatable, unvanquishable]

Definition of 'Invincible'

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]

Synonyms of 'invincible'

From: Moby Thesaurus