Definition of worst

• a. - Bad, evil, or pernicious, in the highest degree, whether in a physical or moral sense. See Worse.
• n. - That which is most bad or evil; the most severe, pernicious, calamitous, or wicked state or degree.
• a. - To gain advantage over, in contest or competition; to get the better of; to defeat; to overthrow; to discomfit.
• v. i. - To grow worse; to deteriorate.