Fault  —n. 1 defect or imperfection of character, structure, appearance, etc. 2 responsibility for wrongdoing, error, etc. (your own fault). 3 break in an electric circuit. 4 transgression, offence. 5 a tennis etc. Incorrect service. B (in showjumping) penalty for error. 6 break in rock strata. —v. 1 find fault with; blame. 2 geol. A break the continuity of (strata). B show a fault.  at fault guilty; to blame. Find fault (often foll. By with) criticize; complain. To a fault excessively (generous to a fault). [latin fallo deceive]