Adapted from Wikipedia’s “Synecdoche“:
Synecdoche is a figure of speech that presents a kind of metaphor in which:
* A part of something is used for the whole (“hands” to refer to workers, “head” for cattle, “threads” for clothing, “wheels” for car, “mouths to feed” for hungry people, “The Press” for news media)
* The whole is used for a part (“the police” for a handful of officers, “body” for the trunk of the body, the “smiling year” for spring, “the Pentagon” for the top-ranking generals in the Pentagon building)