Main Page | See live article | Alphabetical index A sister may be: Literally a female member of a group of siblings in one family a nun or other member of a female religious order a member of a sorority a female hospital nurse a female member of a mutual organisation such as a trade union Metaphorically one of a pair or larger group of similar things with established relations, such as sister cities, sister colleges, or sister companies under common ownership. See also: Seven Sisters This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.