n a wrong action attributable to bad judgment or ignorance or inattention
I could understand his English in spite of his grammatical faults
n an imperfection in an object or machine
n the quality of being inadequate or falling short of perfection
he knew his own faults much better than she did
n (geology) a crack in the earth's 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 earth's crust
n (electronics) equipment failure attributable to some defect in a circuit (loose connection or insulation failure or short circuit etc.)
it took much longer to find the fault than to fix it
n responsibility for a bad situation or event
it was John's fault
n (sports) a serve that is illegal (e.g., that lands outside the prescribed area)
he served too many double faults