adj. & n.
adj. 1 capable of existing or happening; that may be managed, achieved, etc. (came as early as possible; did as much as possible). 2 that is likely to happen etc. (few thought their victory possible). 3 acceptable; potential (a possible way of doing it).
n. 1 a possible candidate, member of a team, etc. 2 (prec. by the) whatever is likely, manageable, etc. 3 the highest possible score, esp. in shooting etc.
[ ME f. OF possible or L possibilis f. posse be able ]