Worst

1. n. That which is most bad or evil; the most severe, pernicious, calamitous, or wicked state or degree.
2. a. Bad, evil, or pernicious, in the highest degree, whether in a physical or moral sense. See Worse.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.