Definition of "handshake"

handshake

noun
plural handshakes
1. The grasping of hands by two people when greeting, leave-taking, or making an agreement.
  Quotations
  Eccles' handshake, eager and practiced and hard, seems to symbolize for him an embrace. For an instant Rabbit fears he will never let go.
  1960, John Updike, 'Rabbit, Run', page 88
2. (computing) An exchange of signals between two devices when communications begin in order to ensure synchronization.
verb
third-person singular simple present handshakes, present participle handshaking, simple past and past participle handshaked or handshook
1. (intransitive) To perform a handshake; to shake hands.
2. (computing, intransitive) To perform a handshake with another device.