Similar to the sense of being rejected, the sense of having been abandoned represents how we experienced not being wanted or not fitting in with others when we were young.
Such a feeling can occur as a result of trauma.
For instance, a child having had to go into hospital may have recurring dreams in adulthood of being abandoned and may have problems in forming plans for future success.
In such dreams there is seldom a sense of closure, often a sense of unfinished business. When we ourselves abandon something, we are becoming aware that we no longer need a particular way of thinking or being.