A word denoted to the gaps in our
memory that we fill in with a plausable but
yet imagined
memory.
And no, it's different to a hallucination, as a confabulation can only be retrospective (hallucinations are happening at the time)
"No, that didn't really happen,
George. What you have just experienced was a confabulation."
"But i swear that time in
year 8 the teacher was wearing huge come fuck me
boots to class..."