1. to cause to occur or operate at the same time or rate
Usage: British spelling
2. to adjust clocks or watches to show the same time
Usage: British spelling
3. to coordinate the timing of sound and picture in film or video
Usage: British spelling; technical

Examples

• The dancers synchronised their movements perfectly.
• We need to synchronise our watches before the mission begins.
• The audio and video tracks were not properly synchronised.
• The swimmers synchronised their strokes during the routine.
• Please synchronise your calendars with the main server.
• The director worked to synchronise the dialogue with the actors’ lip movements.
• All the clocks in the building synchronise automatically at midnight.