Meanings
plural co-sisters
- colleague ("sister" in the same craft, occupation, or society)
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 - IndiaOne's spouse's sibling's wife.
During this time I came to know about tubectomy from my co-sister and also from the female health worker. This time both my husband and father-in-law refused [me the surgery] on the ground that I was the eldest daughter-in-law and a responsible person for the whole family.
1989, Abusaleh Shariff, Fertility transition in rural South India, page 263
Synonyms & antonyms
Origin
From co- + sister. The second meaning was influenced by a Dravidian substrate.
Full word history & related roots →Cite this entry
co-sister. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/co-sister
“co-sister.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/co-sister. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “co-sister,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/co-sister.
Source: co-sister on Wiktionary, CC BY-SA 4.0.