Origin: 1325–75; Middle English defeten (v.) < Anglo-French, Old French desfait, past participle of desfaire to undo, destroy < Medieval Latin disfacere, equivalent to Latin dis-dis-1 + facere to do
Synonyms 1. overwhelm, overthrow, rout, check. Defeat,conquer,overcome,subdue imply gaining a victory or control over an opponent. Defeat suggests beating or frustrating: to defeat an enemy in battle. Conquer implies finally gaining control over, usually after a series of efforts or against systematic resistance: to conquer a country, one's inclinations. Overcome emphasizes surmounting difficulties in prevailing over an antagonist: to overcome opposition, bad habits. Subdue means to conquer so completely that resistance is broken: to subdue a rebellious spirit. 2. foil, baffle, balk. 7. downfall.
late 14c., from Anglo-Norm. defeter, from O.Fr. defait, pp. of defaire, from V.L. *diffacere "undo, destroy," from L. dis- "un-, not" + facere "to do, perform" (see factitious). Original sense was of "bring ruination, cause destruction." Military sense of "conquer" is c.1600.