Sister
Sister may refer to:
- a female sibling
- a member of a sorority
- a female member of a religious institution or congregation, often referred to as a nun in common language
- a female member of a mutual organisation such as a trade union
- one of a pair or larger group of similar things with established relations, such as sister cities or sister colleges
- Sister, an album of the band Letters To Cleo
- Sister, an album of the band Sonic Youth
- Shortened name of Twisted Sister, a rock band.
- a Singlish slang word for transvestite or transsexual.