DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   acknowledgment /ɐknˈɒlɪdʒmənt/ (ACK /ˈak/)
    [Am.] Quittierung <fem>, Quittung <fem>, Rückmeldung <fem>, Empfangsbestätigung <fem> [comp.]  [telco.]
      Synonyms: acknowledgement, receipt confirmation, receipt