Similarity may refer to:

  • Similarity (philosophy ), a philosophical concept
  • In geodesy and astrometry, the similarity transformation
  • Hamming - similarity in the medical and case analysis


  • Similarity ( geometry), a relationship between geometric shapes
  • Similarity (matrix), in linear algebra an equivalence relation on the class of the square matrices
  • Cosine similarity is a measure of the similarity of two vectors
  • In multivariate statistics, the similarity between objects, see similarity analysis


  • Physical similarity, see: similarity theory

See also:

  • Similarity rule ( disambiguation)
  • Match (disambiguation)
  • Disambiguation