Similarity

Similarity can mean:

In mathematics:
 Similarity (geometry), when a shape looks the same as another shape, but has a different size or rotation
 Matrix similarity, a relation between matrices

In computer science:
 String metric, or string similarity
 Semantic similarity in computational linguistics

In other fields:
 In psychology, similarity (psychology)
 In music, musical similarity
 In chemistry, chemical similarity

Related pages
 Difference
 Equality (mathematics)
 Identity (philosophy)