To express approval, especially by clapping the hands.
TRANSITIVE VERB:
1. To express approval of (someone or something) especially by such clapping. 2. To commend highly; praise: applauded her decision to complete her degree.
ETYMOLOGY:
Middle English applauden, from Latin applaudere : ad-, ad- + plaudere, to clap.
applaud, cheer, root3 These verbs mean to express approval or encouragement audibly: applauded at the end of the concert; cheered when the home team scored; rooting for the underdog in the tennis championship.