Spiritual Meaning:
Spiritually, lightning denotes some form of spiritual enlightenment,  literally something which had not ‘struck us’before. In dreams, a lightning flash can also represent the Holy Spirit or the travelling of energy through the various planes of existence into manifestation.

Psychological / Emotional Perspective:
When we dream of lightning we are marking a discharge of tension in some way. There may be a situation in our everyday lives that actually needs to be ‘blasted’– apparently negatively – in order for something to happen which will change the circumstances. If we take all the known facts into account, our intuition will make us aware of the correct action.

Everyday Material Aspects:
Lightning in a dream denotes unexpected changes, which are taking place or are about to take place. This may be the sudden realization of a personal truth, or of a more universal awareness. Often such a revelation has the effect of knocking down the structures we have built in as safeguards in our lives. Alternatively, we may have to make changes in the way we think while leaving our everyday structure and relationships in place. Lightning can also indicate strong passion – such as love – which may strike suddenly but be devastating in its effect.

You might also like to consult the entries for Thunder / Thunderbolts and Weather.