planet-struck /ˈplanɪtstɹʌk/ adjective1 •(no longer used) Afflicted by the astrological influence of a planet; struck down with amazement or shock; panic-stricken.Budaeus records how that, at Louis the Twelfth his death, ..., they that were erst in heaven, upon a sudden, as if they had been planet-strucken, lay grovelling on the ground ... — 1621 formsmore planet-struck · most planet-struck