unscheduled
/ʌnˈskɛdʒuːld/
adjective
- Not planned or included in a schedule; happening at a time not previously arranged.
- An unscheduled power outage caused the computers to shut down.
- We had an unscheduled meeting when the CEO showed up unexpectedly.
- The train made an unscheduled stop due to a medical emergency.
Synonyms