the world > action or operation > failure or lack of success > [noun] > failure or going wrong > instance of (3)
A failure; a blunder or mistake. Now rare except as in sense 2c.
As a count noun: a piece of nonsense; a ridiculous notion or idea; an arrangement of which one disapproves; a muddle, a fiasco. Now frequently…
the act of slipping up (see slip, v.1 8d), a failure, mistake, blunder.