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foil

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1foil/ˈfojəl/verb
foilsfoiledfoiling
1foil
/ˈfojəl/
verb
foilsfoiledfoiling
Learner's definition of FOIL  
[+ object]
: to prevent (someone) from doing something or achieving a goal
: defeat
— often used as (be) foiled
: to prevent (something) from happening or being successful
2foil/ˈfojəl/noun
pluralfoils
2foil
/ˈfojəl/
noun
pluralfoils
Learner's definition of FOIL  
[noncount] : a very thin and light sheet of metal
— see also silver foiltinfoil
[count] : someone or something that is different from another person or thing in a useful or appealing way— usually + for or to
[count] : a sword that has a light, thin blade and that is used in the sport of fencing
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