1. coordinating by causing to indicate the same time

e.g. the synchronization of their watches was an important preliminary

Synonym: synchronizationsynchronisation

2. an adjustment that causes something to occur or recur in unison

Synonym: synchronizationsynchronisationsynchronising

3. the relation that exists when things occur at the same time

e.g. the drug produces an increased synchrony of the brain waves

Synonym: synchronismsynchronysynchronicitysynchroneitysynchronizationsynchronisation