Source : WordNet®

acknowledgement
     n 1: the state or quality of being recognized or acknowledged;
          "the partners were delighted with the recognition of
          their work"; "she seems to avoid much in the way of
          recognition or acknowledgement of feminist work prior to
          her own" [syn: {recognition}, {acknowledgment}]
     2: a statement acknowledging something or someone; "she must
        have seen him but she gave no sign of acknowledgment";
        "the preface contained an acknowledgment of those who had
        helped her" [syn: {acknowledgment}]