A cupboard was initially just that, a place to store utensils. Now it often represents a repository, perhaps in the spiritual sense, for skills or for hidden talents.
Psychological / Emotional Perspective:
Various types of cupboard can appear in dreams. A wardrobe suggests a period of transition and, because it houses our clothes, how we deal with our self-image, whereas a larder represents our ability to preserve or conserve our stores of energy. Finding a hidden cupboard suggests rediscovering something we may have forgotten. Opening a cupboard and finding it bigger than expected suggests available opportunities.
Everyday Material Aspects:
Clearing out a cupboard indicates that we may have to put our lives in order. Articles falling out of a cupboard suggest that we may be overstretched and / or overstretching ourselves.