Stupor: A state of near-unconsciousness or insensibility, typically caused by alcohol, drugs, or injury.
Other possible meanings:
* Tupor could be a specific term in a particular field or language, in which case you'd need to provide more context.
* It could be a made-up word or a slang term.
If you can provide more context about where you encountered the word "tupor," I might be able to give you a more accurate definition.