SISTER

noun Etymology: Middle English suster, ~, partly from Old English sweostor and partly from Old Norse systir ~; akin to Latin soror ~, Sanskrit svasṛ Date: before 12th century a female who has one or both parents in common with another, 2. often capitalized a member of a women's religious order (as of nuns or deaconesses), a girl or woman who is a member of a Christian church, 3. a girl or woman regarded as a comrade, a girl or woman who shares with another a common national or racial origin, one that is closely similar to or associated with another , nurse , 6. girl , woman , person , a member of a sorority