Meaning of “similarity” - Learner’s Dictionary

similarity

noun [ C, U ] uk us /ˌsɪmɪˈlærəti/

B2 the state of being similar, or a way in which people or things are similar:

There are a number of similarities between the two systems.
He bears a striking similarity to his grandfather.

(Definition of “similarity” from the Cambridge Learner’s Dictionary © Cambridge University Press)