An explicit comparison, often (but not necessarily) employing "like" or
"as."
Examples
My love is like a red, red rose
Robert Burns Her hair was like gravy, running brown off her head and clumping up on her shoulders. The day we passed together for a while Seemed a bright fire on a winter's night —Maurice Sceve You are like a hurricane: there's calm in your eye, but I'm getting blown away —Neil Young The air-lifted rhinoceros hit the ground like a garbage bag filled with split pea soup.