|Compare metaphor a figure of speech that expresses the resemblance of one thing to another of a different category, usually introduced by as or like|
|[C14: from Latin simile something similar, from similis like]|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|a chattering or flighty, light-headed person.|
A common figure of speech that explicitly compares two things usually considered different. Most similes are introduced by like or as: “The realization hit me like a bucket of cold water.” (Compare metaphor.)
Note: Some similes, such as “sleeping like a log,” have become clichés.