definition of
possibility

[1] #1 possibility n. a future prospect or potential; "this room has great possibilities". wn

[2] #2 possibility n. [possibleness] capability of existing or happening or being true; "there is a possibility that his sense of smell has been impaired". wn

[3] #3 possibility n. [hypothesis, theory] 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"; "he proposed a fresh theory. wn

[4] #4 possibility n. [possible action, opening] a possible alternative; "bankruptcy is always a possibility". wn