similarity Meaning, Definition & Usage

  1. noun the quality of being similar
  2. noun a Gestalt principle of organization holding that (other things being equal) parts of a stimulus field that are similar to each other tend to be perceived as belonging together as a unit
    law of similarity.

WordNet

Sim`i*lar"i*ty noun
Etymology
Cf. F. similarité.
Wordforms
plural -ties
Definitions
  1. The quality or state of being similar; likeness; resemblance; as, a similarity of features.
    Hardly is there a similarity detected between two or three facts, than men hasten to extend it to all. Sir W. Hamilton.

Webster 1913