Final answer:
A dystopia is defined as an imagined society where people lead oppressive and fearful lives, usually under a tyrannical government, as exemplified in George Orwell's 1984.
Step-by-step explanation:
The term dystopia is best defined as (c) an imagined world or society in which people lead wretched, dehumanized, fearful lives. This is typically characterized by a tyrannical government, environmental disaster, or other characteristics that lead to the suffering and oppression of its citizens. For instance, George Orwell's 1984 presents a future society where critical thinking is suppressed by a totalitarian regime, serving as a prime example of a dystopian society.