co-brother

plural co-brothers · plural co-brethren

1. One's colleague ("brother" in the same craft, occupation, or society).

   My co-brethren of the quill.

   1 more example

   At the death of the co-sisters of the Guild, every co-brother of the Guild to be present

   1900, Arthur Francis Leach, Report on the manuscripts of the corporation of Beverley, page 91

2. IndiaOne's wife's sister's husband.

   If your wife doesn't have a sister, you just can't have a co-brother.

   2007, Sethi, A Handbook Of Standard English And Indian Usage: Vocabulary And Grammar, page 55