legend
A famous old story about heroic people and events.
A legend is a story from the past that might be based on real events or people but has grown more dramatic and exciting over time. The legend of King Arthur tells of a brave British king and his knights, though historians aren't sure if Arthur actually existed. The legend of Robin Hood describes an outlaw who stole from the rich to give to the poor, mixing possible facts with invented adventures.
Legends differ from myths, which are stories about gods and the creation of the world. Legends usually feature human heroes doing extraordinary things: fighting monsters, performing impossible feats, or changing history through their courage. As these stories get retold over generations, they can get exaggerated. A real soldier's bravery in battle might become a legend about fighting a hundred enemies single-handedly.
The word also describes someone so talented or accomplished that their reputation will last for generations. A basketball player might become a legend of the sport, or a scientist might achieve legendary status for discovering something remarkable. When people call someone a legend, they mean that person's achievements are so impressive they'll be remembered and talked about long after they're gone.
You might also see the word legend on a map, where it explains what the symbols and colors mean, helping you understand what you're looking at.