Normally referring to the moment in a play or other work when a character makes a critical discovery, perhaps understanding the real situation for the first time.  I liked Nicolson’s use of it in describing Keats’ discovery of Homer: ‘Keats had read and stared in delight, shocked into a moment of recognition, of what the Greeks called anagnorisis, when the clogging surface is stripped away and the essence for which you have been hungering is revealed’.
Source: Adam Nicolson, The Mighty Dead: Why Homer matters (London: William Collins, 2015), p. 20
