DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   most quiet /mˈəʊst kwˈaɪət/
   am leisesten, am ruhigsten, am stillsten
      Synonym: quietest
    see: quiet, more quiet, quieter