[] an act of shaking sb's hand, used especially to say hello or goodbye or when you have made an agreement握手◆Everything was agreed on a handshake.一切在握手之后都商定了。handshake deal/agreementa deal which has been agreed in a conversation or an email, although there is not yet a formal written agreement口头协议◆He is determined to get them to stick to their handshake deal.他决心让他们履行其口头协议。