a figure of speech in which a similarity between two things is highlighted by using a word to refer to something that it does not literally denote — as when Shakespeare wrote, "All the world's a stage."
For example, Shakespeare wrote, "All the world's a stage, And all the men and women merely players." Shakespeare is not saying the world is really a stage and all people are actors, but there are similarities he wants us to recognize.
He should avoid arcane metaphors.
There are no more uses of "metaphor" in Oryx and Crake.