Meaning of RELATION in English

[noun] [U]The relation between two things is the connection or similarity between them.The relation between the original book and this new film is very faint.She bears no relation to (= She is not similar to) her brother.See also relations at relate to.Someone who is your relation is a member of your family.She's a relation by marriage because she married my cousin.The funeral was attended by friends and relations.In/With relation to means in connection with.She used the map to discover where she was in relation to her surroundings.

Cambridge English vocab.      Кембриджский английский словарь.