A relationship of resemblance or equivalence between two situations, people, or objects, especially when used as a basis for explanation or extrapolation.
The proportion or the equality of ratios.
The correspondence of a word or phrase with the genius of a language, as learned from the manner in which its words and phrases are ordinarily formed; similarity of derivative or inflectional processes.
The state of two or more things existing together, usually in a temporal or spatial sense, with or without mutual interaction.