Pustejovsky's generative lexicon theory holds that words like 'light' have a single underspecified semantic entry whose sense is completed by conceptual co-composition with context.

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Co-composition(describing how meaning is built from multiple sources): The process where two things combine together to create a new result—in this case, how a word's basic meaning combines with contextual information to create the final, specific meaning.
Conceptual(describing the realm of pure thought and reason): Related to ideas, thoughts, and abstract concepts rather than concrete, physical reality.
Generative lexicon theory(as the framework being discussed): A theory explaining how words can systematically have multiple meanings by following predictable patterns and rules, rather than each meaning being a separate accident.
Pustejovsky, James(the namesake of the generative lexicon framework): A cognitive scientist who studies how language works and how words get their meanings; he created a theory about how our brains store and understand word meanings.
Semantic entry(referring to a word's foundational meaning): The basic meaning or definition of a word as it would appear in a dictionary or in a person's mental vocabulary.
Underspecified(contrasting with 'complete' when describing whether a court's reasoning was thorough): Not fully explained or detailed enough; missing some important information or steps in the reasoning, even though what was said wasn't wrong.

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