An analogy is a comparison, especially one that points to similar facts in separate cases and draws a conclusion. Example: “My presentation is about 15 minutes long, like all the others. It’ll be fine.”
A metaphor compares a fact to a mental picture, or image, which may seem unrelated but offers insight or dramatic impact. Example: “Your presentation was a train wreck.”
Tip: A metaphor is always literally untrue.
Technical definition of a metaphor (in rhetoric): Description of a thing in terms that would ordinarily be used for something else, and so suggesting a comparison. Example: Hilary flew out of the room.
Definition of a simile: A metaphor mediated by “like” or “as.” Example: My love is like a red, red rose. (Robert Burns)
(Posted on FB June 28, 2014)