fault (Noun) — A wrong action attributable to bad judgment, ignorance or inattention. ex. "I could understand his English in spite of his grammatical faults"
fault (Noun) — An imperfection in an object or machine. ex. "if there are any faults you should send it back to the manufacturer"
fault (Noun) — The quality of being inadequate or falling short of perfection. ex. "he knew his own faults much better than she did"
fault (Noun) — (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other. ex. "they built it right over a geological fault"
fault (Noun) — (electronics) equipment failure attributable to some defect in a circuit (loose connection or insulation failure or short circuit etc.). ex. "it took much longer to find the fault than to fix it"
fault (Noun) — Responsibility for a bad situation or event. ex. "it was John's fault"
fault (Noun) — (sport) a serve that is illegal (e.g., that lands outside the prescribed area). ex. "he served too many double faults"
fault (Verb) — Put or pin the blame on.
fault (Verb) — Commit a mistake or make an error.