sync1 , synch
if things are in sync, they are working well together at exactly the same time and speed
be/move/work in sync
The two mechanisms have to work in sync.
The soundtrack is not quite in sync with the picture.
matching or in agreement:
a celebrity who is in sync with young people's lifestyles
The President is in sync with Thompson's views on many issues.
if things are out of sync, they are not working well together at exactly the same time and speed
not matching or not in agreement