adjective
Definition: The lowest quality or the most negative condition; the least good or most undesirable option.
Example: This was the worst movie I have ever seen.
adverb
Definition: In the most negative or least favorable way possible.
Example: She performed the task in the worst way imaginable.
noun
Definition: The least good or most unpleasant thing or person in a particular situation.
Example: The worst of the storm is yet to come.
transitive verb
Definition: To be the least good or most unpleasant in quality or degree.
Example: This is the worst movie I have ever seen.