noun
a framework of metal bars or wires used as a screen, divider, or guard, typically in front of a window or as a cover for a vent or radiator
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The intricate design of the metal grille added an elegant touch to the building's facade.
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I accidentally bumped into the grille and now it's slightly bent.
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The party was so hot, even the grille outside couldn't handle it!
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His emotions were like a tightly locked grille, keeping his true feelings hidden from everyone.