- The definition of invincible is someone or something that cannot be harmed or that is too powerful to be destroyed.
A superhero who cannot be killed is an example of someone who would be described as invincible.
Pembroke Castle was built to be invincible.
invincible definition by Webster's New World
Origin: Middle English invyncyble ; from Middle French invincible ; from Classical Latin invincibilis: see in- and amp; vincible
invincible definition by American Heritage Dictionary
Origin: Middle English, from Old French, from Latin invincibilis : in-, not; see in-1 + vincibilis, conquerable; see vincible.
- in·vinˌci·bilˈi·ty, in·vinˈci·ble·ness noun
- in·vinˈci·bly adverb