1. the quality or state of being similar; resemblance
There is a striking similarity between the two paintings.
Há uma similaridade marcante entre os dois quadros.
2. a feature or aspect that is shared by two or more things
The similarities between the brothers are obvious.
As similaridades entre os irmãos são óbvias.
3. in mathematics or geometry, the quality of having the same shape but different sizes
The similarity of the triangles allowed us to solve the problem.
A similaridade dos triângulos nos permitiu resolver o problema.