(electronics) equipment failure attributable to some defect in a circuit (loose connection or insulation failure or short circuit etc.)(noun.event)
Example: It took much longer to find the fault than to fix it.
source: wordnet30
responsibility for a bad situation or event(noun.attribute)
Example: It was John's fault.
source: wordnet30
(sports) a serve that is illegal (e.g., that lands outside the prescribed area)(noun.act)
Example: He served too many double faults.
source: wordnet30
Defect; want; lack; default.(noun)
source: webster1913
A defective point in an electric circuit due to a crossing of the parts of the conductor, or to contact with another conductor or the earth, or to a break in the circuit.(noun)