agreement or similarity, esp in a certain limited number of features or details
2.
a comparison made to show such a similarity: to draw an analogy between an atom and the solar system
3.
biology the relationship between analogous organs or parts
4.
logic, maths a form of reasoning in which a similarity between two or more things is inferred from a known similarity between them in other respects
5.
linguistics imitation of existing models or regular patterns in the formation of words, inflections, etc: a child may use ``sheeps'' as the plural of ``sheep'' by analogy with ``dog'', ``dogs'', ``cat'', ``cats'', etc
[C16: from Greek analogia ratio, correspondence, from analogosanalogous]