Inner Time
Dreaming of running late: meaning and interpretation
The clock that runs inside
Pressure, demands and the fear of being left out. It is not a literal warning.
Symbolic reading
Being late in a dream, for an exam, a flight or an appointment, often speaks of pressure and of the fear of not measuring up or of missing a chance. It sometimes shows up when you carry more than fits in your day. Look at what you were late for: that points to where you feel the pressure.
Jungian key
From a Jungian angle, the dream clock sets outer time, the time of schedules, against inner time, which keeps its own rhythm. The dream compensates for an attitude that lives chasing the calendar and forgets its own pace.
What matters will not leave without you. Breathe and arrive at your own pace.