I was a way of letting go. Once she threw it in the ocean, she was able to pass away and be with her true love. i wont explain but i would just say (heart of the ocean->rose), (ocean->jack dawson), (brock lovett->caledon hockley). thats why rose didnt give that diamond to brock.
Definition of post-traumatic stress disorder for English Language Learners medical: a mental condition that can affect a person who has had a very shocking or difficult experience (such as fighting in a war) and that is usually characterized by depression, anxiety, etc.
PTSD, or Posttraumatic Stress Disorder, is a psychiatric disorder that can occur following the experience or witnessing of a life-threatening events such as military combat, natural disasters, terrorist incidents, serious accidents, or physical or sexual assault in adult or childhood. Most survivors of trauma return to normal given a little time.