Exact historical dictionary sense
Fault in Webster's 1913 dictionary
The 1913 record labels fault as noun. Its source-bounded etymology and selected historical definition appear below.
[OE. faut, faute, F. faute (cf. It., Sp., & Pg. falta), fr. a verb meaning to want, fail, freq., fr. L. fallere to deceive. See Fail, and cf. Default.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "fault" is labeled noun. Its etymology is recorded as: "[OE. faut, faute, F. faute (cf. It., Sp., & Pg. falta), fr. a verb meaning to want, fail, freq., fr. L. fallere to deceive. See Fail, and cf. Default.]" The selected historical definition says: "Defect; want; lack; default."