•A feature of the entity relationship model that allows a relationship set to participate in another relationship set.

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• This is indicated on an ER diagram by drawing a dashed box around the aggregation.

The aggregation between a man and a woman is considered a marriage.

aggregation means a group or mass of distinct or varied things, persons

The aggregation between a man and a woman is considered a marriage. The aggregation between a man and a woman is considered a marriage.

An aggregation number is the number of molecules which are associated together to form a micelle.

The dictionary meaning of aggregation is putting together separate pieces to form a whole entity. Aggregation is combining many elements to create a total.