# Dictionary Definition

dissimilarity n : the quality of being dissimilar
[syn: unsimilarity]
[ant: similarity]

# User Contributed Dictionary

## English

### Noun

- Not similar in appearance to something else, antonym of similarity

# Extensive Definition

Similarity is some degree of symmetry in either analogy and resemblance between two or
more concepts or
objects.
The notion of similarity rests either on exact or approximate
repetitions of patterns
in the compared
items. In the case of approximate repetitions we talk about
statistical similarity as found in a fractal and its parts. Finding
similarities or distinguishing between dissimilarities depends on
the faculties of pattern
recognition and disambiguation,
respectively.

A general method to calculate probability of an event
based on another similar event is called relative probability If A, B are
different events Probability of A = P(A) Then P(B) = P(A) x R where
R is the similarity ratio between A,B If A=B --> R=1 If A
R=0

## Specific definitions

Different fields provide differing definitions of similarity:- In mathematics,
- In psychology, similarity (psychology)
- In music, Musical similarity
- In chemistry, Chemical similarity
- In engineering, similarity or similitude describe the geometric, kinematic and dynamic 'likeness' of two (or more) systems.
- In computational linguistics, semantic similarity
- In philosophy, similarity is defined as sharing properties or characteristic traits. The sky is similar to the sea, for example, because the sky and the sea both share the property of being blue. This definition has some interesting consequences. First, it follows that resemblance is reflexive, since everything shares its own properties. Second, it follows that resemblance is symmetric, since if x shares properties with y then y shares those same properties with x. Third, qualitative identity turns out to be a limiting case of resemblance, since qualitative identity is defined as sharing all rather than some properties.

## See also

difference, sameness, equalitydissimilarity in German: Ähnlichkeit

dissimilarity in French: similitude

# Synonyms, Antonyms and Related Words

contrariety, contrast, departure, deviation, difference, disaccord, disaccordance, disagreement, disconformity, discongruity, discord, discordance, discrepancy, discreteness, disparity, dissemblance, dissent, dissimilitude, dissonance, distance, distinction, distinctness, divarication, divergence, divergency, diversity, far cry, heterogeneity, inaccordance, incompatibility,
incongruity,
inconsistency,
inconsonance,
inequality, inharmoniousness,
inharmony, irreconcilability,
margin, mixture, nonconformity, odds, offset, opposition, otherness, separateness, severance, unconformity, unlikeness, unorthodoxy, variance, variation, variegation, variety