Definitions of synchronize:

• verb:   happen at the same time
• verb:   make synchronous and adjust in time or manner

  Example: "Let's synchronize our efforts"

• verb:   cause to indicate the same time or rate

  Example: "Synchronize your watches"

• verb:   operate simultaneously

  Example: "The clocks synchronize"

• verb:   arrange or represent events so that they co-occur

  Example: "Synchronize biblical events"

• verb:   make (motion picture sound) exactly simultaneous with the action

  Example: "Synchronize this film"