to a degree possible of achievement or by possible means
"they can't possibly get here in time for the funeral?"
Perhaps; indicates that the proposition may be true (is not certainly false) regardless of any facts or circumstances known to, stated by or implied by the speaker.
"I don't know for sure if he is coming, but it is possibly true that he will arrive late."
In plain English: Possibly means that something might happen but isn't certain yet.
"You are possibly late for the meeting if you do not hurry."
Usage: Use possibly to indicate that something might happen or be true without claiming certainty. Place it before the main verb or after the verb "be" to modify the likelihood of an action occurring.
Possibly is formed by adding the suffix -ly to the word possible. It entered English as an adverb meaning "in a way that is possible."