possibility

noun

1. a future prospect or potential"this room has great possibilities"
2. capability of existing or happening or being true"there is a possibility that his sense of smell has been impaired"
3. a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena"a scientific hypothesis that survives experimental testing becomes a scientific theory"
4. a possible alternative"bankruptcy is always a possibility"