n.

1. 承認；（對權威、功績等的）確認[U]
   I bowed my head in acknowledgement of guilt.

   我低下頭來承認過失。

2. 答謝的表示，致謝；謝禮[C][U]
   We are sending you a small sum of money in acknowledgement of your help.

   為感謝你的幫助我們寄上一小筆錢。

3. （對收到來信等的）確認通知；回音[C]
   We have had no acknowledgement of our letter.

   我們沒有收到過確認去信已收到的回音。

4. 【律】承認書；公證狀

n.

1. the action or fact of acknowledging.
2. (acknowledgements) a statement printed at the beginning of a book expressing the author's gratitude to others.