DICT.TW Dictionary Taiwan

 where·on /-ˈɔn, ˈɑn/
 (ad.)在什?上面,在那上面

 Where·on adv.
 1. On which; -- used relatively; as, the earth whereon we live.
    O fair foundation laid whereon to build.   --Milton.
 2. On what; -- used interrogatively; as, whereon do we stand?
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 whereon
      adv : on which; "land whereon to grow corn"