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