Definition of "Fault" :

noun: a wrong action attributable to bad judgment or ignorance or inattention

"I could understand his English in spite of his grammatical faults."

noun: (sports) a serve that is illegal (e.g., that lands outside the prescribed area)

"He served too many double faults."

noun: responsibility for a bad situation or event

"It was John's fault."

noun: the quality of being inadequate or falling short of perfection

"He knew his own faults much better than she did."

noun: (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."

noun: (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."

noun: an imperfection in an object or machine

verb: put or pin the blame on