- A female who has the same parents with another person, or who has one of them only. In the latter case, she is more definitely called a half sister. The correlative of brother."I am the sister of one Claudio." [Shak.]
- A woman who is closely allied to, or assocciated with, another person, as in the sdame faith, society, order, or community.
- One of the same kind, or of the same condition; -- generally used adjectively; as, sister fruits.
Etymology: OE. sister, fr. Icel. systir; also suster, from AS. sweostor sweoster swuster, akin to OFries. sweester suster, LG. süster suster, D. zuster, OS. & OHG. swestar, G. schwester, Icel. systir, Sw. syster, Dan. söster, Goth. swistar, Lith. ses�, Russ. sestra, Pol. siostra, L. soror, Skr. svasr. √298. Cf. Cousin