Alarm Clock dream meaning is explained below using 6 different sources. Each interpretation is shown with its source.

Interpretation 1 — Nancy Wagaman

A “wake-up call” about something, or an indicator that a certain issue or situation in your life needs your attention.

The end or beginning of a process (since an alarm clock ends your sleep and begins your waking time).

Something or someone that interrupted a process in your life (or that tends to do so).

The alarm clock not going off can represent: fear of neglecting a responsibility and facing the consequences, the importance you place on a certain upcoming event, not trusting others to alert you when something is wrong, a feeling or fear of missing out on something.

See Waking Up, Morning, Clock, Time, Late, Missing an Event

Source: The Curious Dreamer’s Dream Dictionary • Author: Nancy Wagaman

Interpretation 2 — Silvana Amar

Wake up, time may be of the essence. Do you fear growing old? Perhaps you have too many irons in the fire to get them all completed. Important event about to take place. Take caution of those you are keeping company with. It could be internal patterns being replayed in some situation. This happens so we can get it right this time around and repattern these troublemakers. 
Source: The Bedside Dream Dictionary • Author: Silvana Amar

Interpretation 3 — Garuda

Vision: If you hear an alarm clock go off in your dream: expect unpleasant surprises; it is time to replenish your energies.

See Clock.

Depth Psychology: The alarm clock is usually a reminder—like the Bell, Whistle, or Signal—to be awake and not “sleep through” something!

Source: Dreamers Dictionary • Author: Garuda

Interpretation 4 — Dr. Mıchael Lennox

This mechanism for timing your wakefulness relates to control and preparedness. Since there is often a great deal of anxiety around being on time for important events, this object in a dream may point to a desire to make absolutely sure you are ready for the things that need your attention.
Source: Complete Dictionary of Dreams • Author: Dr. Mıchael Lennox

Interpretation 5 — Ibn Seerin

(Timepiece) Seeing an alarm clock in a dream means exposing ills, richness of a poor person, or fulfilling a promise.

(Also see Clock)

Source: Islamic Dream Interpretation • Author: Ibn Seerin

Interpretation 6 — Raymond Buckland

You are afraid of growing old. You have many plans and wonder if you’ll ever have time to implement them all.

See also Clock.

Source: Gypsy Dream Dictionary • Author: Raymond Buckland