Idiom and Phrases

An idiom is a common word or phrase with a culturally understood meaning that differs from what its composite words denotations would suggest.
For example, an English speaker would understand the phrase "kick the bucket" to mean "to die" – and also to actually kick a bucket.
Furthermore, they would understand when each meaning is being used in context.
An idiom is not to be confused with other figures of speech such as a metaphor, which invokes an image by use of implicit comparisons (e.g., "the man of steel" ); a simile, which invokes an image by use of explicit comparisons (e.g., "faster than a speeding bullet"); and hyperbole, which exaggerates an image beyond truthfulness (e.g., like "missed by a mile" ).
Idioms are also not to be confused with proverbs, which are simple sayings that express a truth based on common sense or practical experience.