From Longman Dictionary of Contemporary Englishpossiblypos‧si‧bly /ˈpɒsəbli $ ˈpɑː-/ ●●●S1W2 adverb 🔊 🔊 1MAYBEused when saying that something may be true or likely, although you are not completely certain syn perhaps, maybe 🔊 This last task is possibly the most difficult. 🔊 It will take three weeks, possibly longer. 🔊 ‘Will you be here tomorrow?’ ‘Possibly.’ 🔊 ‘Was it murder?’ ‘Quite possibly (=it is very likely).’2spokenSURPRISED used to emphasize that you are very surprised or shocked by something, or you cannot understand it 🔊 How could anyone possibly do such a thing?3 →could/can you possibly4TRY TO DO OR GET somethingused to emphasize that someone will do or has done everything they can to help or to achieve something 🔊 We shall be contributing as much as we possibly can to the campaign. 🔊 Doctors did everything they possibly could to save his life.5REFUSEused to emphasize that you cannot do something, or that something cannot or could not happen or be donecan’t/couldn’t possibly 🔊 I can’t possibly allow you to go home in this weather. 🔊 She couldn’t possibly have heard what was said.