It means “lack of success”

‘It’s still miles to go,’ she said. ‘I mean to do it,’ said Granny. ‘There’s plenty of night left.’ ‘Not enough, I’m thinking.’ ‘A witch doesn’t know the meaning of the word “failure”, Gytha.’ They shot up into the clear air again. The horizon was a line of golden light as the slow dawn of the Disc sped across the land, bulldozing the suburbs of the night. ‘Esme?’ said Nanny Ogg, after a while. ‘What?’ ‘It means “lack of success”.’ They flew in chilly silence for several seconds.

T. Pratchett, Wyrd sisters (1988), loc. 2,813

I often think this is the role I would play on quests. It would not be a helpful one.