Living Dead Spirits

My grandfather was up late one night taking care of his deathly ill neighbor. She was asleep and it was around 4 am in the morning. He was tired and decided to walk back home just long enough to take a bath and change clothes before sitting with her longer. There were other people with her just in case she needed anything. The walk home was on a narrow gravel road shaded by trees. As he walked, he saw a woman walking his direction. He couldn't make out who she was at first until she was closer. It was his neighbor he had just left. He quickly changes sides of the road, afraid of what he was seeing. He stated he could count every button on her dress and even see her shoe strings. She continues to walk with an emotionless face until she passed him. He never turned to see where she was going or if she had changed direction. Instead, he rushed home, confused and terrified of what he had just seen. He continues with his plan to take a quick bath and soon return to her side. Just as he was getting ready to leave his house, he received a call from next door. The call was to inform him of her passing.

I don't know what to refer to these type of spirits as. Maybe they're omens or restless spirits of those passing.