Similarity is when two or more things share some qualities that are the same. Two brothers might have the same bright blue eyes, showing a similarity between them.
When we think about similarity, we often talk about how people look, but it can also mean how things behave or work. For example, you might notice a similarity between your favorite car and another one on the road - maybe they both have automatic transmissions. If two cities are similar in size and culture, you might say there's a similarity between them. Even if something doesn't look like its original version, it can still show some kind of similarity to the past.
Closeness of appearance to something else.
