invincible /ɪnˈvɪn.sə.bəl/adjective 1noun 1forms 1 adjective1 •Impossible to defeat, destroy, or kill; too powerful to be defeated or overcome.You know our armie is inuincible: As many circumcized Turkes we haue, And warlike bands of Christians renyed, As hath the Ocean or the Terrene sea Small drops of water, […] — 1587 noun1 •Someone or something that cannot be defeated, destroyed, or killed. formsinvincibles