the condition or state of being final and irreversible;
e.g. He refused to accept the finality of the game's outcome and tried his hardest until the end.
(noun)
the quality of being final or complete in authority or development, often indicated in someone's manner or tone that they don't with to argue or comment;
e.g. She said with finality that she would not be returning.
(noun)
a fact, belief, event, or action that is final in permanently ending something;
e.g. His departure was the finality that ended their relationship.