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 theory about 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""he proposed a fresh theory of alkalis that later was accepted in chemical practices"4. a possible alternative;
"bankruptcy is always a possibility"