similarity
n.-
1 being alike (n.) B1 Intermediatethe state of being like someone or something else.
the quality or state of being similar; a lack of significant difference between two entities.
ExampleThe similarity between the two sisters is amazing; they look like twins.
ExampleThe striking similarity between the two architectural styles suggests a shared cultural influence during the late nineteenth century.
- difference
- dissimilarity
PitfallThere is a similarity between him to his brother.There is a similarity between him and his brother.When comparing two people or things using 'similarity', use 'between X and Y' or 'to X'.
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2 a shared feature (n.) B1 Intermediatea specific feature or detail that is the same in two different things.
a specific point, feature, or detail in which two things resemble each other.
ExampleThe two movies have many similarities, such as the same main actor and a similar ending.
ExampleDespite their different origins, the two languages share several structural similarities that fascinate historical linguists.
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3 geometry (n.) C1 Advanced Technical Matha change to a shape that keeps its angles and proportions the same, even if the size changes.
a transformation that preserves angles and the ratios of distances, resulting in a shape that is the same as the original but potentially a different size.
ExampleIn geometry class, we learned how a similarity can make a triangle larger without changing its shape.
ExampleThe proof relies on the properties of similarity to demonstrate that the two polygons, though different in scale, maintain identical internal angles.
UsageOften used in the context of Euclidean geometry to describe 'similar triangles'.
From French similarité. Morphologically similar + -ity