(also grill ) / grɪl; NAmE / noun
a screen made of metal bars or wire that is placed in front of a window, door or piece of machinery in order to protect it :
a radiator grille (= at the front of a car)
a security grille
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WORD ORIGIN
mid 17th cent.: from French , from medieval Latin , craticula , diminutive of cratis hurdle; related to crate , grate metal frame , and griddle .