verb (v)

• clap one's hands or shout after performances to indicate approval(verb.communication)

  Synonym:
  acclaim, clap, spat
  Antonym:
  boo, hiss
  

  source: wordnet30
• express approval of(verb.communication)

  Example:
  I applaud your efforts.
  

  Synonym:
  commend, praise
  

  source: wordnet30
• To show approval of by clapping the hands, acclamation, or other significant sign.(verb)

  source: webster1913
• To express approbation loudly or significantly.(verb)

  source: webster1913