Prehensile means capable of grasping or gripping things. When you wrap your fingers around a baseball bat or grab a rope to climb, you're using your prehensile hands. Humans have remarkably prehensile thumbs that can press against our fingers, letting us grip pencils, tie shoelaces, and manipulate small objects with precision.

Many animals have prehensile body parts too. Monkeys use their long prehensile tails like an extra hand, wrapping them around tree branches while they swing through the forest. An elephant's trunk is prehensile and incredibly strong, able to pluck a single blade of grass or lift a heavy log. Octopuses have eight prehensile arms covered with suckers that can grab and hold onto prey.

Not all body parts that touch things are prehensile: a cat's tail helps with balance but can't grip anything, and a dog's paws touch the ground but can't wrap around objects. Something is only truly prehensile if it can actively curl around or hold onto things, turning a simple touch into a controlled grip.