Mighty means having great power, strength, or force. A mighty river like the Mississippi can carve canyons through solid rock over millions of years. A mighty swing of the bat sends a baseball soaring over the fence. Ancient empires were called mighty when their armies and influence stretched across continents.

The word carries a sense of impressive, almost overwhelming strength. A mouse isn't mighty, but an elephant is. A gentle breeze isn't mighty, but a hurricane certainly is. When someone faces a mighty challenge, they're up against something formidable and difficult.

Mighty can also work as an intensifier, meaning “very” or “extremely,” especially in informal speech. Someone might say “I'm mighty hungry” or “That's mighty kind of you.” This usage adds a touch of down-to-earth emphasis.

The word often appears in stories about heroes, battles, and great deeds: mighty warriors, mighty oaks, mighty kingdoms. There's something almost legendary about it. When you call something mighty, you're recognizing not just that it's strong, but that its strength commands respect and attention.