A relationship of resemblance or equivalence between two situations, people, or objects, especially when used as a basis for explanation or extrapolation.
User Defined Definitions
"an inference that if things agree in some respects they probably agree in others"
"drawing a comparison in order to show a similarity in some respect"
"the religious belief that between creature and creator no similarity can be found so great but that the dissimilarity is always greater; any analogy between God and humans will always be inadequate"