1. a similarity between like features of two things, on which a comparison may be based.
5. Logic. a form of reasoning in which one thing is inferred to be similar to another thing in a certain respect, on the basis of the known similarity between the things in other respects.
“I mean, if you think about — if you think about it, UPS and FedEx are doing just fine, right? No, they are. It’s the Post Office that’s always having problems.”
Such was the analogy President Obama used to tout the health control bill being debated in congress.
Yeah. Could I get colonoscopy and a book of those new “I Love Lucy” stamps?
analogy. Dictionary.com. Dictionary.com Unabridged (v 1.1). Random House, Inc. http://dictionary.reference.com/browse/analogy (accessed: August 11, 2009).