Arrangement in a group or in groups; grouping.(noun)
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Use "aggroupment" in a sentence
"The association of “Arms” with Names, Dignities, and Estates would necessarily require, at an early period in the history of Heraldry, the establishment of some regular and recognised system for the combination and aggroupment of various distinct coats and insignia, whenever a single individual became the representative of more than one family, or was the hereditary possessor of several dignities and properties."
"A very good example of the aggroupment of Shields upon a Seal, under conditions differing from those that now have been illustrated,"
"Secondly, the aggroupment of two or more distinct Coats to form a single heraldic composition, the Shields being still kept distinct from one another: and,"