Real Dictionary

applaud
verb: When a group of people applaud, they clap their hands in order to show approval, for example when they have enjoyed a play or concert.
verb: When an attitude or action is applauded, people praise it.

applaud in American English
to show approval or enjoyment (of) by clapping the hands or by cheering, stamping the feet, etc.
intransitive verb: to clap the hands as an expression of approval, appreciation, acclamation, etc
transitive verb: to clap the hands so as to show approval, appreciation, etc., of

applaud in British English
verb: to indicate approval of (a person, performance, etc) by clapping the hands