Lightship meaning

līt'shĭp'
A ship with a powerful light or warning signals that is anchored in dangerous waters to alert other vessels.
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A ship moored in a place dangerous or important to navigation and bearing a light or lights and foghorns, sirens, etc. by which ships are warned or guided.
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An early family of client/server tools for analyzing data from multidimensional databases from Pilot Software, Cambridge, MA (www.pilotsw.com), a pioneer in the OLAP database field. LightShip included tools for financial modeling, budgeting and consolidation of large databases. It provided Windows-based point-and-click reporting, a full programming language for advanced users, and support for all the popular databases.
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A ship equipped with a very large lamp; it can be positioned to warn off other ships from dangerous locations, as a sort of portable lighthouse.
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Origin of lightship