An idiom is a phrase or expression that has a figurative meaning that is different from the literal meaning of the words. Idioms are often used in everyday language and can be difficult to understand for people who are not native speakers of the language.
Here are some examples of idioms:
* "Kick the bucket" means to die.
* "Spill the beans" means to reveal a secret.
* "Break a leg" means good luck.
These phrases don't make sense if you take them literally, but their figurative meanings are easily understood by native speakers.