A well-known project to develop computer understanding of common sense knowledge of the real world, involving encoding millions of facts and relations between them, so that the machine can draw inferences automatically.
From Glossary of "Weaving the Web" ( 1999-07-23) A knowledge-representation project in which a tree of definitions attempts to express real-world facts in a machine-readable fashion. (Now a trademark of Cycorp Inc.) The cyc home page, now run commercially
Cyc is an artificial intelligence project that attempts to assemble a comprehensive ontology and database of everyday common sense knowledge, with the goal of enabling AI applications to perform human-like reasoning.