An idiom is a phrase or expression that has a figurative meaning different from its literal interpretation. For example, when someone says "it's raining cats and dogs," they don't mean animals are falling from the sky; instead, they are describing heavy rain. Idioms are often culturally specific and can vary widely between different languages and regions. These expressions add color and depth to language, making communication more engaging. They can also reflect cultural values and shared experiences. Understanding idioms is important for language learners, as they often appear in everyday conversation, literature, and media, enriching the way people express ideas and emotions.