Definition of fault

• responsibility for a bad situation or event; "it was Johns fault"
• (geology) a crack in the earths crust resulting from the displacement of one side with respect to the other; "they built it right over a geological fault"; "he studied the faulting of the earths crust"
• the quality of being inadequate or falling short of perfection; "they discussed the merits and demerits of her novel"; "he knew his own faults much better than she did"