Foil

Definition and stakes

Theodore A. Cook,  The Sentiment of the Sword — Preface

“ First-rate foil play has invariably been too delicate in its essence,, too ideal in its aim, too unpractical in its courteous fragility for the majority of Englishmen. It is the foundation of the knowledge of all weapon play, and your true foil player need never be at a loss in a scrimmage, even if he bears but that unromantic symbol of civic respectability the silk umbrella. But in itself the foil has always appealed to a very small minority of our countrymen. ”
Source: Wikisource

Chambers's Twentieth Century Dictionary…

“ Foil, foil, n. a leaf or thin plate of metal, as tin-foil: a thin leaf of metal put under precious stones to increase their lustre or change their colour: anything that serves to set off something else: a small arc in the tracery of a window, &c. (trefoiled, cinquefoiled, multifoiled, &c.) .—adj. Foiled.—n. Foil′ing. [O. Fr. foil (Fr. feuille) —L. folium, a leaf.] ”
Source: Gutenberg

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