Mighty/ˈmaɪti/ Definition 1 of 3Pro Tip 1/3Heroic Undertones Mighty often implies a heroic or impressive nature, not just strength. She made a mighty effort to save the dog. Pro Tip 2/3Not Unbeatable 'Mighty' doesn't mean invincible; even the mighty can have weaknesses. The mighty warrior had a fear of spiders. Pro Tip 3/3Exaggeration for Effect Sometimes 'mighty' is used to exaggerate qualities for storytelling or impact. The tiny mouse let out a mighty squeak.