unscheduled
Without prior arrangement
Unscheduled describes something not planned or listed on a schedule.
An unscheduled stop happens unexpectedly during a journey.
An unscheduled visit arrives without advance notice.
The word often carries a note of disruption or surprise: The plane made an unscheduled landing due to mechanical trouble.
Not predicted or expected
- unanticipatedNot predicted beforehand
- surpriseUnexpected event causing astonishment
- suddenOccurring without prior notice
- unlooked-forNot anticipated or foreseen
unpredictable · startling · abrupt · shock · jarring · emergency · unannounced · unwarned
Without advance preparation
- spur-of-the-momentDone without advance planning
- unplannedNot arranged beforehand
- off-the-cuffUnplanned, unrehearsed
- ad-libUnscripted speech or remark
extemporaneous · impulsive · unrehearsed · unscripted · unprepared · offhand · on-the-spot · whim
Enforced waiting period
- cancellationVoiding of plans
- interruptionBreak in continuity
- stoppageInterruption of flow
- breakdownFailure or decomposition
outage · detour · reroute · layover · holdover · snag · hitch · setback
Not yet claimed
- openNot closed
- availableReady to be used
- uncommittedNot bound to anything
- unreservedNot held back
vacant · unallocated · unassigned · unclaimed · idle · leisure · downtime · blank
unforeseen
Not predicted or expected
- unanticipatedNot predicted beforehand
- surpriseUnexpected event causing astonishment
- suddenOccurring without prior notice
unlooked-for · unpredictable · startling · abrupt · shock · jarring · emergency · unannounced · unwarned · blindsiding
impromptu
Without advance preparation
- spur-of-the-momentDone without advance planning
- unplannedNot arranged beforehand
- off-the-cuffUnplanned, unrehearsed
ad-lib · extemporaneous · impulsive · unrehearsed · unscripted · unprepared · offhand · on-the-spot · whim · snap-decision
delay
Enforced waiting period
- cancellationVoiding of plans
- interruptionBreak in continuity
- stoppageInterruption of flow
breakdown · outage · detour · reroute · layover · holdover · snag · hitch · setback · complication
unbooked
Not yet claimed
- openNot closed
- availableReady to be used
- uncommittedNot bound to anything
unreserved · vacant · unallocated · unassigned · unclaimed · idle · leisure · downtime · blank · clear
- time wordsminute, hour, day, now, soon
- attendanceattendance, present, absent, here, attendance sheet
- statusespending, active, approved, inactive, completed
- arrival wordsarrived, landed, here, present, home
- broadcast statuslive, recorded, on air, off air, streaming
- frequencyfrequency, hertz, Hz, kilohertz, megahertz
unscheduledscheduled
Arranged for specific time
planned · prearranged · prescheduled · timetabled · arranged
schedule, scheduled, reschedule, scheduling, rescheduled, rescheduling, scheduler, preschedule, prescheduled