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1 definition by teenagedramaqueen

 
1.
Soul: the immaterial part of a person; the actuating cause of an individual life

Sister: a female person who has the same parents as another person

Soul Sister: Someone who fully understands you. Like a soulmate, but not someone you want to marry and make babies with. The sister of your soul.
1)As quoted in Confessions of a Teenage Drama Queen, "Ella Gerard you are the sister of my soul"

2)Hayley just gets me, she understand everything about me, she's my soul sister.
by teenagedramaqueen April 09, 2006