Adjective pretty has 2 senses
  1. pretty - pleasing by delicacy or grace; not imposing; "pretty girl"; "pretty song"; "pretty room"
    Antonym:
    ugly (indirect, via beautiful)
  2. pretty - (used ironically) unexpectedly bad; "a pretty mess"; "a pretty kettle of fish"
    Antonym:
    good (indirect, via bad)
,Adverbial pretty has 1 sense
  1. pretty, jolly - used as an intensifier (`jolly' is used informally in Britain); "pretty big"; "pretty bad"; "jolly decent of him"
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