Exact historical dictionary sense
Worst in Webster's 1913 dictionary
The 1913 record labels worst as adjective. Its source-bounded etymology and selected historical definition appear below.
[OE. werst, worste, wurste, AS. wyrst, wierst, wierrest. See Worse, a.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "worst" is labeled adjective. Its etymology is recorded as: "[OE. werst, worste, wurste, AS. wyrst, wierst, wierrest. See Worse, a.]" The selected historical definition says: "Bad, evil, or pernicious, in the highest degree, whether in a physical or moral sense. See Worse."