verb (v)

• declare to be true or admit the existence or reality or truth of(verb.communication)

  Example:
  She acknowledged that she might have forgotten.
  

  Synonym:
  admit
  Antonym:
  deny
  

  source: wordnet30
• report the receipt of(verb.communication)

  Example:
  The program committee acknowledged the submission of the authors of the paper.
  

  Synonym:
  receipt
  

  source: wordnet30
• express recognition of the presence or existence of, or acquaintance with(verb.communication)

  Example:
  He never acknowledges his colleagues when they run into him in the hallway.
  She acknowledged his complement with a smile.
  It is important to acknowledge the work of others in one's own writing.
  

  Synonym:
  notice
  

  source: wordnet30
• express obligation, thanks, or gratitude for(verb.communication)

  Example:
  We must acknowledge the kindness she showed towards us.
  

  Synonym:
  recognise, recognize
  

  source: wordnet30
• accept as legally binding and valid(verb.cognition)

  Example:
  Acknowledge the deed.
  

  source: wordnet30
• accept (someone) to be what is claimed or accept his power and authority(verb.cognition)

  Example:
  The Crown Prince was acknowledged as the true heir to the throne.
  

  Synonym:
  know, recognise, recognize
  

  source: wordnet30
• To of or admit the knowledge of; to recognize as a fact or truth; to declare one's belief in; as, to acknowledge the being of a God.(verb)

  source: webster1913