
1) American radio soap opera 2) An elder sister 3) Company of the Czech Republic
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https://www.crosswordclues.com/clue/big-sister
[radio] Big Sister was a daytime radio drama series created by Lillian Laugerty and broadcast on CBS from September 14, 1936 to December 26, 1952. It was sponsored by Lever Brothers (Rinso) until 1946 when Procter & Gamble became the sponsor. Set in the fictional town of Glen Falls, the program dramatized the life of Ruth Evans who sacrific...
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http://en.wikipedia.org/wiki/Big_Sister_(radio)
[software] Big Sister System and Network Monitor is open source software, licensed under the GNU General Public License version 2 as published by the Free Software Foundation. Big Sister originally was the Big Sister network monitor. Now, multiple projects in the realm of system management and monitoring are run under the label Big Sister. ...
Found on
http://en.wikipedia.org/wiki/Big_Sister_(software)

[
n] - an older sister
Found on
http://www.webdictionary.co.uk/definition.php?query=big%20sister
noun an older sister
Found on
https://www.encyclo.co.uk/local/20974

an elder sister. · (sometimes caps.) a woman who individually or as a member of an organized group undertakes to sponsor or assist a girl in need of help or guidance. · (sometimes caps.) a young woman in the junior or senior class in college who advises a young woman in the freshman class on studies, social activities, etc., often as a...
Found on
https://www.infoplease.com/dictionary/big-sister
No exact match found.