The meaning of WORST is most corrupt, bad, evil, or ill. How to use worst in a sentence. superlative of bad: of the lowest quality, or the most unpleasant, difficult, or severe: 2. The adjective worst describes the thing that is the least good, like this awful pizza, the worst we've ever had in our lives. Worst is used to form the superlative of compound adjectives beginning with 'bad' and 'badly'. For example, the superlative of 'badly-affected' is 'worst-affected'. The adjective worst describes the thing that is the least good, like this awful pizza, the worst we've ever had in our lives.
