not easy to believe
"incredibly, she survived the crash"
exceedingly; extremely
"she plays fabulously well"
"behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains"
In an incredible manner; not to be believed.
"The magician performed tricks so incredibly that even his own assistants refused to believe what they had just witnessed."
In plain English: Incredibly means something is so amazing that it's hard to believe.
"The weather was incredibly hot yesterday, so we stayed inside all day."
Usage: Use incredibly as an intensifier before adjectives or other adverbs, such as in the phrase "incredibly fast," rather than directly modifying nouns like "an incredibly story." It functions similarly to extremely but often carries a slightly stronger sense of astonishment when describing surprising facts.
The word incredibly comes from combining the adjective incredible with the suffix -ly to form an adverb. It entered English by adding a standard grammatical ending to describe something that cannot be believed.