Which of the following is the best definition of an analogy?

• organizing words by classification
• showing a similarity between unlike things
• identifying differences in words
• comparing synonyms and antonyms

The best definition of an analogy is showing a similarity between unlike things. To understand this, let's break it down further.

An analogy is a comparison that aims to explain or clarify something by pointing out similarities between two different things or concepts. It brings together ideas from unrelated areas to help us understand a new or complex idea by relating it to something more familiar.

To identify the best definition of an analogy among the options provided, we can examine each choice:

- Organizing words by classification: This describes the process of categorizing or grouping similar words together based on shared characteristics. While classification may play a role in certain analogies, it is not the overall defining feature of an analogy. Therefore, this option does not capture the essence of an analogy accurately.

- Showing a similarity between unlike things: This definition accurately reflects the core purpose of an analogy. Analogies are used to draw comparisons and highlight similarities between things that are otherwise dissimilar. Hence, this is the correct definition.

- Identifying differences in words: This definition focuses on distinguishing dissimilarities rather than highlighting similarities, which is the primary purpose of an analogy. Consequently, this option does not align with the concept of an analogy.

- Comparing synonyms and antonyms: While a comparison of synonyms (words with similar meanings) and antonyms (words with opposite meanings) can be a useful language exercise, it does not fully encompass the breadth and purpose of an analogy. Analogies involve drawing connections between different ideas or things, unlike the direct comparison of synonyms and antonyms.

In conclusion, the correct and most fitting definition of an analogy is showing a similarity between unlike things.