Top Definition
The union of two men as brothers, lovers, best friends, etc.

The word is not a portmanteau of fraternity and matrimony but coined from Latin frater "brother" and -monia "state or condition of being" on the pattern of matrimony from Latin mater "mother" and -monia.

The etymology suits platonic blood brotherhoods, best friendships, etc. as well as romantic unions (since such unions between men lack a potential mother).
Achilles and Patroclus' holy fratrimony is narrated in the epic The Iliad.

The sermon for the men's fratrimony was based on the fourth chapter of Ecclesiastes.
by androkyle April 20, 2012
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