Definition of "sistership" []

• The kinship relation between a female offspring and the siblings (noun)
• An association or society of women who are linked together by a common religion or trade or interest (noun)

WordNet. Princeton University. 2010.

• "Running 24 hours late due to stormy weather, the Endeavour rollout came one day after sistership Discovery landed at KSC on its 39th and final flight."
• "NASA hopes it won't need it, but just in case the shuttle Atlantis/Hubble Space Telescope servicing crew needs a rescue sistership Endeavour will be ready to serve."
• "Differences and similarities along with years of caring and sharing have enhanced our sistership."